Search found 24 matches
- Tue Jun 05, 2018 12:52 pm
- Forum: Electronegativity
- Topic: Periodic Trends
- Replies: 8
- Views: 843
Re: Periodic Trends
There are no exceptions to those trends, as far as I know.
- Tue Jun 05, 2018 12:51 pm
- Forum: Ideal Gases
- Topic: Ideal gases
- Replies: 3
- Views: 515
Re: Ideal gases
Yes, assume it is ideal.
- Tue Jun 05, 2018 12:50 pm
- Forum: Hybridization
- Topic: sp^3d or dsp^3
- Replies: 6
- Views: 828
Re: sp^3d or dsp^3
The order does not matter, as far as I know.
- Sun Jun 03, 2018 10:37 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Bond types
- Replies: 6
- Views: 723
Re: Bond types
They're used to distinguish different molecule shapes.
- Sun Jun 03, 2018 10:36 pm
- Forum: Biological Examples
- Topic: Hemoglobin Structure
- Replies: 3
- Views: 526
Re: Hemoglobin Structure
You don't need to know that, as far as I know.
- Sun Jun 03, 2018 10:34 pm
- Forum: Hybridization
- Topic: Differences Between Pi and Sigma bonds
- Replies: 7
- Views: 790
Re: Differences Between Pi and Sigma bonds
Sigma bonds are present in all bonds, pi bonds are not.
- Sun May 27, 2018 10:41 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: formal charge
- Replies: 11
- Views: 1680
Re: formal charge
Formal Charge = (Valence Electrons) - (Lone Pair Electrons) - (0.5 x Bonded Electrons)
- Sun May 27, 2018 10:39 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: oxidation
- Replies: 7
- Views: 861
Re: oxidation
The + denotes losing an electron, the - denotes gaining one.
- Sun May 27, 2018 10:38 pm
- Forum: Resonance Structures
- Topic: Contributing to Resonance Structures
- Replies: 4
- Views: 650
Re: Contributing to Resonance Structures
Yes, essentially. The most stable Lewis structure is always the one with the lowest energy.
- Sun May 20, 2018 8:35 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal charge purpose
- Replies: 40
- Views: 7267
Re: Formal charge purpose
Because you always want the lowest formal charge possible in order to have the most stable Lewis Structure. I heard from my TA that it is possible you will have to calculate formal charges for points on either Test 3 or the final.
- Sun May 20, 2018 8:33 pm
- Forum: Electronegativity
- Topic: Isoelectronic [ENDORSED]
- Replies: 11
- Views: 1552
Re: Isoelectronic [ENDORSED]
It means they have the same number of electrons. Ions of one element may be isoelectronic with uncharged atoms of another due to the gain/loss of electrons.
- Sun May 20, 2018 8:32 pm
- Forum: Ionic & Covalent Bonds
- Topic: 3.29
- Replies: 6
- Views: 793
Re: 3.29
It's essentially asking you which one has the highest electronegativity.
- Sun May 13, 2018 8:55 pm
- Forum: Lewis Structures
- Topic: Order of Dots
- Replies: 11
- Views: 1279
Re: Order of Dots
Pretty sure there is not a specific order for the dots.
- Sun May 13, 2018 8:53 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron configuration
- Replies: 7
- Views: 798
Re: Electron configuration
The direction does not matter as long as you follow the usual configuration rules.
- Sun May 13, 2018 8:46 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic vs Covalent vs Metallic Bonds
- Replies: 6
- Views: 1383
Re: Ionic vs Covalent vs Metallic Bonds
Ionic bonds transfer electrons, covalent bonds share electrons.
- Sun May 06, 2018 4:54 pm
- Forum: Properties of Electrons
- Topic: Is this movement noticeable?
- Replies: 4
- Views: 590
Re: Is this movement noticeable?
Cars, balls, etc. are too large (mass is too high) to exhibit noticeable wavelike properties.
- Sun May 06, 2018 4:53 pm
- Forum: Limiting Reactant Calculations
- Topic: Test #1 Question 6 Part B [ENDORSED]
- Replies: 2
- Views: 530
Re: Test #1 Question 6 Part B [ENDORSED]
The mass of leftover reactant is just the mass of the non-limiting reactant that remains when the limiting reactant has been used up.
- Sun May 06, 2018 4:51 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Shapes of orbitals
- Replies: 6
- Views: 787
Re: Shapes of orbitals
As far as I know, you don't need to know the specific orbital shapes for the midterm.
- Sun Apr 29, 2018 11:09 pm
- Forum: Properties of Electrons
- Topic: electron mass
- Replies: 15
- Views: 1689
Re: electron mass
Whether it makes a difference depends on the problem. Electrons do have mass, but it's extremely small. The exact value will probably be provided on the tests.
- Sun Apr 29, 2018 11:05 pm
- Forum: Photoelectric Effect
- Topic: Test 2 final question [ENDORSED]
- Replies: 15
- Views: 1943
Re: Test 2 final question [ENDORSED]
From my understanding, photons are units of light. They have energy, but they are not energy per se.
- Sun Apr 29, 2018 10:56 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Quiz #2 Question #2 B
- Replies: 5
- Views: 1943
Re: Quiz #2 Question #2 B
Jumping down 2 levels (from n=5 to n=3) is a larger jump distance, which creates a lower wavelength and thus higher energy as far as I know.
- Sun Apr 22, 2018 8:47 pm
- Forum: Properties of Light
- Topic: Homework 1.5
- Replies: 6
- Views: 637
Re: Homework 1.5
A lower wavelength means the frequency is higher because there are more waves in the same amount of time. So, because the frequency of gamma rays is the highest, their energy will also be the highest.
- Sun Apr 22, 2018 8:44 pm
- Forum: Properties of Light
- Topic: Electromagnetic Spectrum [ENDORSED]
- Replies: 7
- Views: 793
Re: Electromagnetic Spectrum [ENDORSED]
My TA told me not to worry about memorizing the electromagnetic spectrum. I would just focus on remembering the relationships between energy, frequency, and wavelength.
- Sun Apr 22, 2018 8:42 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 3
- Views: 1198
Re: Test 2
I'm pretty sure my TA said all of the necessary equations are provided on the test, so you probably just need to memorize what each variable represents.