Search found 110 matches
- Sat Mar 14, 2020 9:44 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Molecularity
- Replies: 4
- Views: 355
Re: Molecularity
I think we will need to know molecularity conceptually and be able to identify a given reaction's molecularity.
- Sat Mar 14, 2020 9:42 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Submission
- Replies: 8
- Views: 777
Re: Final Submission
The final will be submitted via CCLE.
- Sat Mar 14, 2020 9:38 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Exam Time
- Replies: 13
- Views: 947
Re: Final Exam Time
Yes the final exam is timed and we will have three and a half hours to complete six questions.
- Sat Mar 14, 2020 9:29 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final time
- Replies: 5
- Views: 499
Re: Final time
Yes the final will be from 11:15AM to 2:45 PM.
- Sat Mar 14, 2020 9:25 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Printing for Final
- Replies: 9
- Views: 744
Re: Printing for Final
The final will be online so we will not need to print anything out.
- Sun Mar 08, 2020 9:06 pm
- Forum: Administrative Questions and Class Announcements
- Topic: test 2 worksheet
- Replies: 3
- Views: 372
Re: test 2 worksheet
There are probably worksheets given out during the workshop sessions or by TAs but homework problems are a great resource for practice.
- Sun Mar 08, 2020 8:00 pm
- Forum: Student Social/Study Group
- Topic: Test 2 Homework Problems, Etc
- Replies: 6
- Views: 445
Re: Test 2 Homework Problems, Etc
I would recommend going back through the the textbook and reading the breakdown of steps for each type of problem. You can also try working backwards and look at the work written in the solutions manual.
- Sun Mar 08, 2020 7:41 pm
- Forum: Administrative Questions and Class Announcements
- Topic: test 2
- Replies: 3
- Views: 328
Re: test 2
Test 2 will cover sections 5G and 5J from outline four and 6K-6O from outline five.
- Sun Mar 08, 2020 7:40 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2 Thermodynamics
- Replies: 4
- Views: 360
Re: Test 2 Thermodynamics
Test 2 will cover the second page of thermodynamics and all of outline five.
- Sun Mar 08, 2020 7:36 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Sections for Homework
- Replies: 3
- Views: 414
Re: Sections for Homework
Homework from electrochemistry or kinetics should be fine!
- Sun Mar 08, 2020 7:20 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2 Grades
- Replies: 22
- Views: 1272
Re: Test 2 Grades
I think we will be given our tests back next week during discussion section.
- Sun Mar 08, 2020 7:18 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Excellence in Chemistry Award!
- Replies: 27
- Views: 10037
Re: Excellence in Chemistry Award!
Congrats Rachana!
- Sun Mar 01, 2020 2:27 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 15
- Views: 933
Re: Test 2
Test 2 will cover material that we have gone over after the midterm, including the second page of outline 4 and outline 5. I would assume Test 2 will more closely resemble the structure of Test 1 as they are both not cumulative in nature.
- Sun Mar 01, 2020 2:22 pm
- Forum: Balancing Redox Reactions
- Topic: Acidic and Basic solutions
- Replies: 11
- Views: 753
Re: Acidic and Basic solutions
In an acidic solution, use H2O and H+ to balance the reaction.
- Sun Mar 01, 2020 2:16 pm
- Forum: General Science Questions
- Topic: HW Problems for Test 2
- Replies: 5
- Views: 590
Re: HW Problems for Test 2
Problems from 5G and 5J will be covered on test 2.
- Sun Mar 01, 2020 2:15 pm
- Forum: General Science Questions
- Topic: Studying
- Replies: 67
- Views: 3944
Re: Studying
Homework problems, review sessions, lecture notes and online videos are great resources to use when studying for this class!
- Wed Feb 26, 2020 7:02 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Study guide
- Replies: 7
- Views: 615
Re: Study guide
As mentioned above, I don't think there are official study guides for this course but the topic outlines and homework problems should be a good representation of what topics to know and what to expect on the test.
- Wed Feb 26, 2020 7:00 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2 Material
- Replies: 16
- Views: 1066
Re: Test 2 Material
Test 2 will cover the second page of outline 4 and all of outline 5, but it will not be covering chemical kinetics.
- Wed Feb 26, 2020 6:58 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 5
- Views: 481
Re: Test 2
Yes, Test 2 has been moved to week 9.
- Wed Feb 26, 2020 6:57 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 10
- Views: 670
Re: Test 2
I believe Test 2 will cover the rest of thermodynamics (second page of outline 4) and all of electrochemistry (outline 5).
- Wed Feb 26, 2020 6:57 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Extra Credit
- Replies: 17
- Views: 1008
Re: Extra Credit
I don't believe there are any extra credit opportunities in this class.
- Sun Feb 16, 2020 9:50 pm
- Forum: Student Social/Study Group
- Topic: set up of the midterm
- Replies: 4
- Views: 321
Re: set up of the midterm
The general set up of the midterm is eight questions and the test is out of 120 points.
- Sun Feb 16, 2020 9:47 pm
- Forum: Administrative Questions and Class Announcements
- Topic: HW7
- Replies: 14
- Views: 832
Re: HW7
Homework problems from outlines 4 and 5 should be accepted!
- Sun Feb 16, 2020 9:46 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 11
- Views: 763
Re: Test 2
Test 2 will not be cumulative. Instead, it will focus on topics we cover after the midterm.
- Sun Feb 16, 2020 9:45 pm
- Forum: Student Social/Study Group
- Topic: Midterm and Final Question
- Replies: 18
- Views: 1113
Re: Midterm and Final Question
There will be midterm and final review sessions held by the TAs and UAs which will usually be supplemented with worksheets. Other than homework, Sapling Learning and online module questions, I don't believe there are official study guides for this class.
- Sun Feb 16, 2020 9:43 pm
- Forum: Student Social/Study Group
- Topic: Number of Chemistry Community Posts
- Replies: 45
- Views: 2631
Re: Number of Chemistry Community Posts
5 posts are due every Sunday and the easiest way to keep track of the number of posts is to subtract your total from 50!
- Sun Feb 16, 2020 9:16 pm
- Forum: Student Social/Study Group
- Topic: just confirming there is no class Wednesday of the midterm?
- Replies: 5
- Views: 401
Re: just confirming there is no class Wednesday of the midterm?
There is no class on the day of the midterm but there are small q&a sessions during class times.
- Sun Feb 09, 2020 11:26 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm
- Replies: 12
- Views: 638
Re: Midterm
The midterm is from 6-8PM.
- Sun Feb 09, 2020 11:24 pm
- Forum: Administrative Questions and Class Announcements
- Topic: memorizing things?
- Replies: 13
- Views: 644
Re: memorizing things?
Most equations are given to us on the equation sheet, but make sure you know what the variables represent.
- Sun Feb 09, 2020 11:20 pm
- Forum: Administrative Questions and Class Announcements
- Topic: HW 5
- Replies: 3
- Views: 130
Re: HW 5
Homework 5 can be from the later parts of outline 3 or outline 4.
- Sun Feb 09, 2020 11:18 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Material
- Replies: 13
- Views: 759
Re: Midterm Material
Dr. Lavelle posted a document on his website with all information regarding the midterm! The midterm will cover through outline 4 except any topics from chapter 5.
- Sun Feb 09, 2020 11:08 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Content
- Replies: 6
- Views: 382
Re: Midterm Content
Yes, the midterm will cover content from 4J.
- Sun Feb 09, 2020 11:07 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm dates
- Replies: 11
- Views: 511
Re: Midterm dates
The midterm will be cumulative of topics through thermodynamics. Dr. Lavelle made clear during lecture that the midterm will not cover any topics from Chapter 5 in Outline 4.
- Sun Feb 02, 2020 6:27 pm
- Forum: Ideal Gases
- Topic: Homework 3
- Replies: 6
- Views: 483
Re: Homework 3
It should be fine to do problems from outline two for homework three as long as you complete five problems!
- Sun Feb 02, 2020 6:26 pm
- Forum: Ideal Gases
- Topic: Kc vs Kp
- Replies: 109
- Views: 5032
Re: Kc vs Kp
Kp is used when all products and reactants in the equation are gases. Another indication to use Kp is if the question uses units like bar or atm. Kc is used when the molarity of the products and reactants is given, even though the products and reactants involved in the reaction are gases.
- Sun Feb 02, 2020 6:22 pm
- Forum: General Science Questions
- Topic: Midterm
- Replies: 17
- Views: 1007
Re: Midterm
Review sessions dedicated to the midterm might have helpful worksheets which replicate problems we can expect on the midterm but other than that, Sapling learning, textbook problems and online module post assessments are the best resources for practice.
- Sun Feb 02, 2020 6:19 pm
- Forum: General Science Questions
- Topic: Test 1: Sig Figs
- Replies: 7
- Views: 391
Re: Test 1: Sig Figs
Sig figs count on test 1 and for pH, the numbers after the decimal point are counted for sig figs. Dr. Lavelle has a document on his website regarding sig figs rules which will be helpful!
- Sun Feb 02, 2020 6:16 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Weaker Base, Higher pKb
- Replies: 4
- Views: 268
Re: Weaker Base, Higher pKb
Lower pKb indicates a stronger base. We know that pKb is the -log(Kb) so if the value of Kb is large, pKb will be lower. The greater the value of Kb, the lower the value of pKb (stronger base).
- Sun Feb 02, 2020 6:12 pm
- Forum: General Science Questions
- Topic: Midterms
- Replies: 22
- Views: 960
Re: Midterms
The midterm will cover content from outlines 1-3 and part of outline 4.
- Sun Feb 02, 2020 6:10 pm
- Forum: General Science Questions
- Topic: Extra Credit
- Replies: 19
- Views: 838
Re: Extra Credit
Based on the syllabus, I do not believe there are any extra credit opportunities in this class.
- Fri Jan 24, 2020 2:42 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Exothermic vs. Endothermic reactions
- Replies: 12
- Views: 979
Re: Exothermic vs. Endothermic reactions
It is a fair question to expect on Test 1. If a reaction is exothermic, delta H will be negative as heat is released while a reaction that is endothermic will have a positive delta H as heat is needed.
- Fri Jan 24, 2020 2:40 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Prep for Test 1
- Replies: 16
- Views: 683
Re: Prep for Test 1
You don’t need to memorize specific values but it will be very helpful to know common equations we have gone over in class!
- Fri Jan 24, 2020 11:45 am
- Forum: Ideal Gases
- Topic: test 1
- Replies: 9
- Views: 429
Re: test 1
Test 1 covers outline 1 and 2 which are chemical equilibrium and acids and bases.
- Fri Jan 24, 2020 11:38 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Equilibrium concentration help
- Replies: 4
- Views: 257
Re: Equilibrium concentration help
It is best to keep solids and liquids out of the ice table as they are not used to calculate K.
- Fri Jan 24, 2020 11:34 am
- Forum: Student Social/Study Group
- Topic: Test 1 14B Topics
- Replies: 4
- Views: 250
Re: Test 1 14B Topics
Outline 1 and 2 will be covered on Test 1!
- Thu Jan 23, 2020 1:19 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: suggestions
- Replies: 16
- Views: 575
Re: suggestions
Khan academy and organic chemistry tutor videos are very helpful!
- Thu Jan 23, 2020 1:09 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ice table
- Replies: 13
- Views: 567
Re: ice table
No you do not include liquids or solids in ICE tables.
- Thu Jan 23, 2020 12:49 pm
- Forum: Student Social/Study Group
- Topic: midterm/final
- Replies: 12
- Views: 2253
Re: midterm/final
The midterm and final are cumulative of the topics we cover in class and connect multiple concepts while tests are condensed versions, covering less material.
- Thu Jan 23, 2020 12:36 pm
- Forum: Student Social/Study Group
- Topic: Test 1
- Replies: 9
- Views: 594
Re: Test 1
I don't think there are any practice tests Lavelle provides but homework problems, post assessments from the online modules and Sapling Learning are all great resources for preparation!
- Thu Jan 23, 2020 12:33 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Calculating K
- Replies: 15
- Views: 774
Re: Calculating K
To calculate Q and K, your equation should be balanced.
- Thu Jan 23, 2020 12:24 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Test 1
- Replies: 4
- Views: 210
Re: Test 1
I believe that Dr. Lavelle mentioned Test 1 will cover outline 1 and outline 2
- Thu Jan 23, 2020 12:16 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: pH sig figs
- Replies: 9
- Views: 461
Re: pH sig figs
Numbers after the decimal point count as significant figures for pH.
- Tue Jan 21, 2020 12:38 am
- Forum: Ideal Gases
- Topic: ICE Tables
- Replies: 8
- Views: 527
Re: ICE Tables
This depends on each reaction, but if the reaction is moving in the forward direction, reactants in the ice table will have a change of -x and products in the ice table will have a change of +x.
- Thu Jan 16, 2020 3:40 pm
- Forum: Ideal Gases
- Topic: Topics on Test 1
- Replies: 37
- Views: 1409
Re: Topics on Test 1
Test 1 will most likely cover the entirety of chemical equilibrium and part of outline 2.
- Mon Dec 09, 2019 5:56 am
- Forum: Amphoteric Compounds
- Topic: Memorization?
- Replies: 10
- Views: 465
Re: Memorization?
Memorizing the amphoteric oxides is really helpful!
- Mon Dec 09, 2019 5:54 am
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Content of the final
- Replies: 11
- Views: 1029
Re: Content of the final
Dr. Lavelle didn’t really emphasize or focus on bond order so I don’t think we will be expected to know this concept for the final.
- Mon Dec 09, 2019 5:53 am
- Forum: Bronsted Acids & Bases
- Topic: Strong Acids and Bases
- Replies: 8
- Views: 574
Re: Strong Acids and Bases
There is a table in the textbook and Dr. Lavelle also mentioned them during lecture! Strong acids are HI, H2SO4, HCl, HBr, HNO3, HClO4 and strong bases are group 1 and group 2 oxides and hydroxides excluding magnesium.
- Mon Dec 09, 2019 5:50 am
- Forum: Student Social/Study Group
- Topic: Practice Final
- Replies: 17
- Views: 1413
Re: Practice Final
Lyndon’s review session helped with clarifying concepts covered in his packet which was just as effective as practice tests!
- Sat Nov 30, 2019 3:51 am
- Forum: Student Social/Study Group
- Topic: Preparing for the final
- Replies: 25
- Views: 1276
Re: Preparing for the final
As everyone has mentioned, youtube has some really useful videos for understanding the concepts we cover during lecture. Exposing yourself to as many problems as you can will be very beneficial because it will solidify your understanding of the topics. In addition, I think that reworking problems ca...
- Sat Nov 30, 2019 3:43 am
- Forum: Air Pollution & Acid Rain
- Topic: Final
- Replies: 8
- Views: 1169
Re: Final
In lecture, Lavelle recommended going through the acid rain problems in the textbook so I think we should be familiar with the biological applications of what we learned in the context of acid rain and air pollution.
- Sat Nov 30, 2019 3:40 am
- Forum: General Science Questions
- Topic: study tips for the final
- Replies: 3
- Views: 229
Re: study tips for the final
I would definitely recommend reworking all the assigned homework problems and making sure you know the concepts behind these questions. The midterm is also a valuable resource to review again!
- Thu Nov 28, 2019 8:28 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Bronsted vs. Lewis Acids and Bases
- Replies: 4
- Views: 307
Re: Bronsted vs. Lewis Acids and Bases
A Bronsted acid is a proton donor and a Bronsted base is a proton acceptor. A Lewis acid is an electron pair acceptor while a Lewis base is an electron pair donor.
Re: 9C3d
It does not make a difference because both (OH2) and (H2O) represent the same molecule; (OH2) simply highlights the interaction between the lone pair on the oxygen and the central metal atom.
- Sun Nov 24, 2019 11:58 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: melting point
- Replies: 8
- Views: 651
Re: melting point
The melting point would most likely decrease.
- Sun Nov 24, 2019 11:57 pm
- Forum: Hybridization
- Topic: 2F.5
- Replies: 3
- Views: 261
Re: 2F.5
Hybridization is determined using the VSEPR theory and considering the molecular shape of the molecule. Based on this, BeCl2 has an sp hybridization. BH3 has an sp2 hybridization. BH42 has an sp3 hybridization and SiF4 has an sp3 hybridization.
- Sun Nov 24, 2019 11:53 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: types of bonds
- Replies: 14
- Views: 1233
Re: types of bonds
Yes a triple bond consists of one sigma bond and two pi bonds
- Sun Nov 24, 2019 11:53 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Sigma and Pi Bonds
- Replies: 33
- Views: 1701
Re: Sigma and Pi Bonds
Order does not matter as long as you state that there is one sigma and two pi bonds
- Sun Nov 24, 2019 11:49 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Final
- Replies: 10
- Views: 582
Re: Final
The final is cumulative!
- Sun Nov 24, 2019 11:49 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: AXE Format
- Replies: 34
- Views: 1260
Re: AXE Format
If there's only one X and E, the subscript of one is unnecessary.
- Sun Nov 17, 2019 5:42 pm
- Forum: Hybridization
- Topic: test 2
- Replies: 8
- Views: 505
Re: test 2
Sigma and pi bonds will be covered on Monday during lecture and they will be on test 2!
- Sun Nov 17, 2019 5:38 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Radicals for VSEPR
- Replies: 3
- Views: 287
Re: Radicals for VSEPR
There are no specific rules pertaining to radicals in VSEPR theory. This means that one lone electron would be considered the same as one lone pair (in terms of regions) when determining the total regions of electron density.
- Sun Nov 17, 2019 5:33 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Repulsion
- Replies: 6
- Views: 332
Re: Repulsion
The strength of repulsion is as follows: lone pair-lone pair>lone pair- bonding pair> bonding pair- bonding pair. This allows us to conclude that lone pairs have the highest repulsion and therefore affect the bond angles, usually resulting in a slight decrease in the angles overall.
- Sun Nov 17, 2019 5:28 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Do we have to memorize the names of shapes and/or the bond angles?
- Replies: 7
- Views: 527
Re: Do we have to memorize the names of shapes and/or the bond angles?
Test 2 covers Outline 4 and pulls from concepts covered in Outline 3, specifically 3F.
- Sun Nov 17, 2019 5:25 pm
- Forum: Sigma & Pi Bonds
- Topic: Double bond
- Replies: 15
- Views: 596
Re: Double bond
A double bond stabilizes the structure by bringing the formal charge closer to or equal to 0. A Lewis structure is most stable when the central atom has a formal charge of 0 and in some cases, a double bond is needed to achieve this.
- Sun Nov 17, 2019 5:03 pm
- Forum: Trends in The Periodic Table
- Topic: trends on test 2
- Replies: 4
- Views: 294
Re: trends on test 2
Although test 2 may not focus on periodic trends specifically, it is useful to know these trends as they are helpful in determining the behavior, structure and overall polarity of molecules.
- Sun Nov 10, 2019 7:08 pm
- Forum: Student Social/Study Group
- Topic: Midterm Average
- Replies: 12
- Views: 837
Re: Midterm Average
I believe he will be releasing the average during lecture at some point this coming week.
- Sun Nov 10, 2019 7:06 pm
- Forum: Trends in The Periodic Table
- Topic: Electronegativity
- Replies: 11
- Views: 713
Re: Electronegativity
Electronegativity increases as you go across a period and decreases down a group. It is the measure of how strongly atoms attract bonding electrons to themselves.
- Sun Nov 10, 2019 7:03 pm
- Forum: Trends in The Periodic Table
- Topic: Electronegativity
- Replies: 9
- Views: 513
Re: Electronegativity
Electronegativity does follow the same trend as ionization energy and electron affinity. Make sure to remember that there are a few exceptions to the ionization energy trend, but other than that these three properties all share the same trend (increasing across the period and decreasing down a group).
- Sun Nov 10, 2019 7:01 pm
- Forum: Trends in The Periodic Table
- Topic: Midterm Review Problem 10 d
- Replies: 5
- Views: 494
Re: Midterm Review Problem 10 d
Oxygen is an exception to the trend because it is easier for oxygen to give up an electron to have a more stable configuration than it is for nitrogen to give up an electron. This is because nitrogen has three electrons in the p orbital, which is relatively more stable than the four electrons oxygen...
- Sun Nov 10, 2019 6:58 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Polarizability Trends
- Replies: 4
- Views: 167
Re: Polarizability Trends
Polarizability applies to anions and shows that a larger radius (heavier element) correlates with a high polarizability. This is because a larger radius means more electrons and the valence electrons experience a weaker pull from the nucleus. Since it is easier to distort this electron cloud, the po...
- Sun Nov 10, 2019 6:54 pm
- Forum: Student Social/Study Group
- Topic: Chemistry Youtube Channels
- Replies: 8
- Views: 479
Re: Chemistry Youtube Channels
Khan Academy and Bozeman Science are also great channels for reference!
- Sun Nov 03, 2019 9:02 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Aufbau vs Hunds
- Replies: 6
- Views: 515
Re: Aufbau vs Hunds
Aufbau's principle shows the order in which orbitals should be filled while Hund's rule describes that every orbital in a subshell should be occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin.
- Sun Nov 03, 2019 8:57 pm
- Forum: *Particle in a Box
- Topic: Particle in A box
- Replies: 8
- Views: 979
Re: Particle in A box
I don't think it will be necessary to know this concept for the midterm even though it was briefly mentioned in lecture.
- Sun Nov 03, 2019 8:44 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge Shortcut
- Replies: 4
- Views: 269
Re: Formal Charge Shortcut
Formal charge compares the number of electrons around a "neutral atom" with the number of electrons around an atom in a molecule. It plays a key role in creating relatively stable lewis structures.
- Sun Nov 03, 2019 8:32 pm
- Forum: Properties of Light
- Topic: Midterm Exam
- Replies: 21
- Views: 694
Re: Midterm Exam
The midterm will mostly be open ended questions but I think there may be some multiple choice questions as well!
- Sun Nov 03, 2019 8:29 pm
- Forum: Electronegativity
- Topic: size
- Replies: 8
- Views: 502
Re: size
Atomic size decreases across the period and increases down the group while electronegativity increases across the period and decreases down the group.
- Sun Oct 27, 2019 7:07 pm
- Forum: General Science Questions
- Topic: Extra Credit
- Replies: 19
- Views: 838
Re: Extra Credit
Based on what Dr. Lavelle has said in class, I don't think there is any extra credit opportunity as of now.
- Sun Oct 27, 2019 4:47 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Purpose of the Equation
- Replies: 9
- Views: 378
Re: Purpose of the Equation
This equation shows the inverse relationship of the uncertainty of momentum and position, therefore proving that it is impossible to be certain of both values at the same time. Essentially, the more precise the momentum is, the less precise position is and vice versa.
- Sun Oct 27, 2019 4:33 pm
- Forum: Trends in The Periodic Table
- Topic: Electronegativity vs Electron Affinity
- Replies: 6
- Views: 298
Re: Electronegativity vs Electron Affinity
Electronegativity is a property of an atom that isn't necessarily measurable while electron affinity is a value that can be measured. Both properties have the same periodic trend.
- Sun Oct 27, 2019 1:21 pm
- Forum: Student Social/Study Group
- Topic: Study Tips
- Replies: 58
- Views: 4589
Re: Study Tips
For any doubts I have with fundamental concepts, khan academy is a great resource! I definitely think that reviewing my lecture notes after class is a really useful way of solidifying the material Dr. Lavelle teaches.
- Sun Oct 27, 2019 1:17 pm
- Forum: Ionic & Covalent Bonds
- Topic: Midterm Topics Covered
- Replies: 7
- Views: 387
Re: Midterm Topics Covered
I think the midterm will cover the material Dr. Lavelle talked about in the first few lectures of Chemical Bonding.
- Sun Oct 20, 2019 6:51 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Advice for studying
- Replies: 92
- Views: 7709
Re: Advice for studying
Reading the relevant chapters, taking notes on the video modules and reviewing the homework problems are all great ways to prepare for the week and get better with the material.
- Sun Oct 20, 2019 6:46 pm
- Forum: Properties of Electrons
- Topic: Equations for Test
- Replies: 9
- Views: 373
Re: Equations for Test
All equations will be provided but it will be helpful to familiarize yourself with problems dealing with these equations and the constants involved, such as Planck's constant, the mass of protons, neutrons, electrons, etc.
- Sun Oct 20, 2019 6:16 pm
- Forum: Photoelectric Effect
- Topic: Speed of Light
- Replies: 29
- Views: 1620
Re: Speed of Light
Yes the speed of light is a constant and you can use 2.998*10^8 or 3.0*10^8 for its value.
- Sun Oct 20, 2019 6:06 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Quantum Numbers
- Replies: 3
- Views: 139
Re: Quantum Numbers
ml is the third quantum number.
- Sun Oct 20, 2019 6:04 pm
- Forum: Photoelectric Effect
- Topic: 1B19
- Replies: 3
- Views: 248
Re: 1B19
As mentioned in the previous post, the de broglie equation should be used for this problem. The calculations will show that there is no difference in the first three significant figures of the wavelength.
- Sat Oct 19, 2019 1:41 pm
- Forum: Properties of Electrons
- Topic: electron mass
- Replies: 8
- Views: 325
Re: electron mass
Electron mass is very negligible as mentioned in the posts above, but it is good to know this value just in case!
- Sat Oct 19, 2019 1:37 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Tips for the Midterm
- Replies: 10
- Views: 371
Re: Tips for the Midterm
The video modules are another great resource for review!
- Sun Oct 13, 2019 5:22 pm
- Forum: Significant Figures
- Topic: When to apply Sig Figs
- Replies: 6
- Views: 378
Re: When to apply Sig Figs
Sig figs should only be taken into consideration when you have calculated the final answer. In the steps leading up to the final answer, use the entirety of the values to get an accurate answer. As mentioned, applying the rules of sig figs in between calculations can lead to extremely rounded final ...
- Sun Oct 13, 2019 5:11 pm
- Forum: SI Units, Unit Conversions
- Topic: Unit conversion
- Replies: 15
- Views: 1572
Re: Unit conversion
The best way to approach a unit conversion question is convert the units given to an SI unit and then use dimensional analysis to get to the desired unit-- in this case, you can convert Angstroms to meters.