Search found 41 matches

by Anthony_Sandoval_1D
Sun Nov 29, 2020 9:55 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: H20 Shape
Replies: 17
Views: 39

Re: H20 Shape

The bent in H2O is caused by the two lone pairs. The lone pairs repel hydrogen leading to the bent shape of H2O.
by Anthony_Sandoval_1D
Sun Nov 29, 2020 9:51 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape
Replies: 12
Views: 24

Re: Molecular Shape

Lone pairs are important in determining the bond shape. The reason being that they are more repulsive than bond pairs and consequently affect molecule shape.
by Anthony_Sandoval_1D
Sun Nov 29, 2020 9:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Nonpolar bonds
Replies: 7
Views: 18

Re: Nonpolar bonds

No dipole charges are present in non-polar molecules. An example would be CO2 since there is no dipole charge present.
by Anthony_Sandoval_1D
Sun Nov 29, 2020 9:46 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: How do bonds affect shapes?
Replies: 11
Views: 32

Re: How do bonds affect shapes?

Bonds don't affect the shape of the molecule. However, as the person above mentioned, a single bond is the longest length wise.
by Anthony_Sandoval_1D
Sun Nov 29, 2020 9:44 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sigma and Pi Bonds
Replies: 5
Views: 14

Re: Sigma and Pi Bonds

As the last two mentioned, I would try to remember patterns for the final.
by Anthony_Sandoval_1D
Sun Nov 22, 2020 9:28 pm
Forum: Bond Lengths & Energies
Topic: Melting Point
Replies: 12
Views: 40

Re: Melting Point

A stronger intermolecular force leads to a higher melting point.
by Anthony_Sandoval_1D
Sun Nov 22, 2020 9:27 pm
Forum: Lewis Structures
Topic: Lewis acids and bases
Replies: 23
Views: 56

Re: Lewis acids and bases

Lewis acids accept electrons whereas lewis base donates electrons.
by Anthony_Sandoval_1D
Sun Nov 22, 2020 9:23 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: What exactly is a dipole? [ENDORSED]
Replies: 16
Views: 86

Re: What exactly is a dipole? [ENDORSED]

Dipole is basically when one atom is more electronegative than another. This causes that atom to have a strong electron pull which beings them closer. This causes one atom to be partially positive while the other partially negative.
by Anthony_Sandoval_1D
Sun Nov 22, 2020 9:21 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: London Dispersion
Replies: 29
Views: 70

Re: London Dispersion

To answer your question, Yes. London dispersion is occurring in all molecule interactions.
by Anthony_Sandoval_1D
Sun Nov 15, 2020 11:42 pm
Forum: Ionic & Covalent Bonds
Topic: Hydrogen Bonding
Replies: 13
Views: 40

Re: Hydrogen Bonding

F, O, and N are small and are electronegative whereas H is positive.
by Anthony_Sandoval_1D
Sun Nov 15, 2020 11:40 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic radius
Replies: 18
Views: 54

Re: Ionic radius

More negativity in an Ion means a larger radius. On the other hand, positivity causes an Ion to have a smaller radius.
by Anthony_Sandoval_1D
Sun Nov 15, 2020 11:37 pm
Forum: Ionic & Covalent Bonds
Topic: bond lengths
Replies: 9
Views: 20

Re: bond lengths

Double bonds are shorter because more bonding means a stronger attraction. This causes the atoms to be pulled closer to one another creating a shorter distance.
by Anthony_Sandoval_1D
Sun Nov 15, 2020 11:31 pm
Forum: Ionic & Covalent Bonds
Topic: London (Dispersion) Force
Replies: 3
Views: 15

Re: London (Dispersion) Force

LDF is also affected by the distance of molecules. Larger distance means weaker forces which also means more polarity.
by Anthony_Sandoval_1D
Sun Nov 15, 2020 11:29 pm
Forum: Ionic & Covalent Bonds
Topic: midterm 2: knowing compounds
Replies: 14
Views: 46

Re: midterm 2: knowing compounds

As others have said, I believe the name will be provided to us.
by Anthony_Sandoval_1D
Sun Nov 08, 2020 7:57 pm
Forum: Ionic & Covalent Bonds
Topic: Extra Valence Electrons
Replies: 10
Views: 46

Re: Extra Valence Electrons

I believe it was mentioned in lecture but this is because they are exceptions to the octet rule.
by Anthony_Sandoval_1D
Sun Nov 08, 2020 7:55 pm
Forum: Ionic & Covalent Bonds
Topic: Question about bond Length
Replies: 6
Views: 34

Re: Question about bond Length

As was said earlier, I think it's only necessary to remember that bond length is in the order of triple, double, and single with triple being the shortest and single being the longest.
by Anthony_Sandoval_1D
Sun Nov 08, 2020 7:53 pm
Forum: Ionic & Covalent Bonds
Topic: Size of Bonds
Replies: 28
Views: 93

Re: Size of Bonds

Double bonds have stronger force of attraction due to having more electrons. This causes atoms to be drawn tighter to each other and thus creating a shorter bond.
by Anthony_Sandoval_1D
Sun Nov 08, 2020 7:51 pm
Forum: Ionic & Covalent Bonds
Topic: Identifying Ionic and Covalent Bonds
Replies: 10
Views: 36

Re: Identifying Ionic and Covalent Bonds

After calculating the electronegativity, if it is above the value of 2 then it is a covalent bond however if it is below the value of 1.5 then it will be an ionic bond.
by Anthony_Sandoval_1D
Sun Nov 08, 2020 7:48 pm
Forum: Einstein Equation
Topic: E=pc vs E=hv
Replies: 15
Views: 86

Re: E=pc vs E=hv

I would say it depends on the information given to you in the problem. Generally E=pc is used when you are given mass or velocity. E=hv is used when you are given frequency or wavelength.
by Anthony_Sandoval_1D
Sun Nov 01, 2020 11:41 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect
Replies: 12
Views: 88

Re: Photoelectric Effect

A photon with less energy than the work function will not be able to eject electrons. This is only possible when the photon has at least as much energy as the work function.
by Anthony_Sandoval_1D
Sun Nov 01, 2020 11:35 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: d orbitals
Replies: 17
Views: 65

Re: d orbitals

This basically means that there are 5 orbitals in the d-subshell. Additionally, this means that it only holds a maximum of 2 electrons as an orbital can only have 2 electrons.
by Anthony_Sandoval_1D
Sun Nov 01, 2020 11:33 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Atom Radius
Replies: 6
Views: 48

Re: Atom Radius

I would just try to remember that as you move towards the bottom left of the periodic table it increases while going to the top right is decreasing.
by Anthony_Sandoval_1D
Sun Nov 01, 2020 11:30 pm
Forum: Trends in The Periodic Table
Topic: Tips for remembering
Replies: 14
Views: 53

Re: Tips for remembering

I pretty much just memorized them by using flashcards. If that isn't your style maybe try imagining the trends as waves that lead to different islands. Maybe associating it with an image like this will make it easier to recall.
by Anthony_Sandoval_1D
Sun Nov 01, 2020 11:28 pm
Forum: Trends in The Periodic Table
Topic: positive and negative ion
Replies: 14
Views: 41

Re: positive and negative ion

Negatively charged ion have a larger radius than positively charged ions.
by Anthony_Sandoval_1D
Sun Oct 25, 2020 11:44 pm
Forum: Trends in The Periodic Table
Topic: Exceptions to Electronegativity
Replies: 6
Views: 164

Re: Exceptions to Electronegativity

The only exception is the noble gases.
by Anthony_Sandoval_1D
Sun Oct 25, 2020 11:43 pm
Forum: Trends in The Periodic Table
Topic: Period Trends
Replies: 11
Views: 88

Re: Period Trends

Another trend is the atomic radius which increases as you go down the group and decrease from left to right.
by Anthony_Sandoval_1D
Sun Oct 25, 2020 11:39 pm
Forum: Trends in The Periodic Table
Topic: Electronegativity
Replies: 11
Views: 226

Re: Electronegativity

I believe knowing that electronegativity increases from left to right and decreases as you move down is enough.
by Anthony_Sandoval_1D
Sun Oct 25, 2020 11:36 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Midterm 1 Prep
Replies: 9
Views: 57

Re: Midterm 1 Prep

I would look over the outlines sent to us and try to focus on the fundamentals.
by Anthony_Sandoval_1D
Sun Oct 25, 2020 11:33 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Advice for studying
Replies: 92
Views: 1940

Re: Advice for studying

A studying routine that has definitely worked for me is going through each of the lectures individuals and completing as many practice problems as I can.
by Anthony_Sandoval_1D
Sun Oct 18, 2020 11:46 pm
Forum: Properties of Light
Topic: Photoelectric spectrum
Replies: 24
Views: 150

Re: Photoelectric spectrum

I believe having a general idea of what the spectrum looks like should suffice so I would not worry too much about memorizing the smaller details.
by Anthony_Sandoval_1D
Sun Oct 18, 2020 11:42 pm
Forum: Properties of Electrons
Topic: Ionizing Atoms
Replies: 3
Views: 28

Re: Ionizing Atoms

When an ionic bond occurs, an electron is transferred from one atom to another. In other words, one atom gains an electron while the other loses the electron.
by Anthony_Sandoval_1D
Sun Oct 18, 2020 11:39 pm
Forum: Properties of Electrons
Topic: Electrons Excited or Ejected
Replies: 19
Views: 111

Re: Electrons Excited or Ejected

When an electron is ejected this means that it is entering a lower level of energy. When an electron is excited it is entering a higher level of energy.
by Anthony_Sandoval_1D
Sun Oct 18, 2020 11:31 pm
Forum: Properties of Light
Topic: Photon vs Quantum
Replies: 7
Views: 75

Re: Photon vs Quantum

Quantum is at the subatomic level whereas a photon is the smallest particle of light.
by Anthony_Sandoval_1D
Sun Oct 18, 2020 11:23 pm
Forum: Properties of Light
Topic: Photons
Replies: 9
Views: 77

Re: Photons

A photon is a particle that carries energy.
by Anthony_Sandoval_1D
Sun Oct 11, 2020 11:58 pm
Forum: Balancing Chemical Reactions
Topic: Periodic Table
Replies: 50
Views: 408

Re: Periodic Table

You do not need to memorize the periodic table but if you still would like to make attempt at it I would recommend getting flashcards and writing the chemical abbreviation with the full name on the other. Testing yourself at the end of every week will ensure that you eventually remember it.
by Anthony_Sandoval_1D
Sun Oct 11, 2020 11:51 pm
Forum: Empirical & Molecular Formulas
Topic: Trouble with Sapling Question #8
Replies: 4
Views: 39

Re: Trouble with Sapling Question #8

I was having the same problem until I made sure I was typing in capital letters. Maybe this will solve your problem?
by Anthony_Sandoval_1D
Fri Oct 09, 2020 11:34 pm
Forum: SI Units, Unit Conversions
Topic: Textbook
Replies: 22
Views: 168

Re: Textbook

A free trial is available for two weeks. I received an email from the UCLA store a day prior to my access code arriving so I would be on the lookout for that.
by Anthony_Sandoval_1D
Fri Oct 09, 2020 11:31 pm
Forum: Significant Figures
Topic: Which number determines sig figs of the answer?
Replies: 26
Views: 143

Re: Which number determines sig figs of the answer?

The number with the least amount of figures determines the sig figs.
by Anthony_Sandoval_1D
Fri Oct 09, 2020 11:27 pm
Forum: Significant Figures
Topic: Sig Fig usage on exams
Replies: 11
Views: 101

Re: Sig Fig usage on exams

I have read that the exam will be multiple choice. If this is not the case I would strive to be as accurate as possible.

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