Search found 36 matches

by PriscillaLi_3G
Mon Nov 11, 2019 5:30 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Magnetic Quantum numbers
Replies: 11
Views: 28

Re: Magnetic Quantum numbers

It goes from -l to l, with all the numbers in between.
by PriscillaLi_3G
Mon Nov 11, 2019 5:28 pm
Forum: DeBroglie Equation
Topic: Velocity
Replies: 12
Views: 57

Re: Velocity

It would be considered unreasonable.
by PriscillaLi_3G
Mon Nov 11, 2019 5:27 pm
Forum: Trends in The Periodic Table
Topic: Ionization energy
Replies: 5
Views: 18

Re: Ionization energy

Nitrogen has a half-full shell, which is more stable, so it would be harder to remove an electron, thus increasing the ionization energy. In addition, the 4th electron in the oxygen atom has an electron-electron repulsion with the other electron in the orbital, thus making it easier to remove the el...
by PriscillaLi_3G
Mon Nov 11, 2019 5:10 pm
Forum: Lewis Structures
Topic: Expanded Octet
Replies: 9
Views: 41

Re: Expanded Octet

Some elements (such as period 3) have empty d orbitals that can accommodate more electrons, and so we can overlook the octet rule for those atoms.
by PriscillaLi_3G
Mon Nov 11, 2019 5:08 pm
Forum: Einstein Equation
Topic: E=hv
Replies: 41
Views: 1362

Re: E=hv

E represents the energy of one photon
by PriscillaLi_3G
Mon Nov 11, 2019 5:08 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge Equation
Replies: 3
Views: 10

Re: Formal Charge Equation

just count the number electrons and dashes and subtract it from the atom's number of valence electrons
by PriscillaLi_3G
Mon Nov 11, 2019 5:07 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Determine Formal Charge
Replies: 3
Views: 8

Re: Determine Formal Charge

You should give the negative formal charge to the most electronegative element because they want the electron to complete their shells and become more stable.
by PriscillaLi_3G
Mon Nov 11, 2019 5:06 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal charge
Replies: 16
Views: 48

Re: Formal charge

Second best option is to get the formal charges of each atom as close to zero as possible. Give the negative formal charges to the atoms with higher electronegativity.
by PriscillaLi_3G
Tue Nov 05, 2019 9:15 pm
Forum: Einstein Equation
Topic: e=hv used for particles?
Replies: 3
Views: 26

e=hv used for particles?

Can E=hv be used only for electromagnetic radiation? Or can it also be applied to particles?
by PriscillaLi_3G
Tue Nov 05, 2019 8:47 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Lyman
Replies: 1
Views: 23

Lyman

In the Lyman series, is the final n =1 or is initial n=1?
by PriscillaLi_3G
Sat Nov 02, 2019 5:08 pm
Forum: Electronegativity
Topic: Definition
Replies: 2
Views: 10

Definition

What exactly does electronegativity mean?
by PriscillaLi_3G
Sat Nov 02, 2019 5:07 pm
Forum: Bond Lengths & Energies
Topic: Single bond vs double bond
Replies: 14
Views: 91

Re: Single bond vs double bond

Angstrom is a unit of length, so the numbers represent the bond length between the two atoms. I believe the reason Professor Lavelle cared to specify the lengths of the bonds is to show that single bonds are longer than double bonds.
by PriscillaLi_3G
Sat Nov 02, 2019 5:04 pm
Forum: Dipole Moments
Topic: Definition
Replies: 5
Views: 24

Definition

What exactly is a dipole moment?
by PriscillaLi_3G
Sat Nov 02, 2019 5:00 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Minimize formal charge of whole molecule?
Replies: 7
Views: 25

Minimize formal charge of whole molecule?

When drawing lewis structures, is the goal to have the formal charges of each atom add up as closely as possible to zero? Or for the formal charge of each individual atom to be as close to zero as possible?
by PriscillaLi_3G
Sat Nov 02, 2019 4:53 pm
Forum: Resonance Structures
Topic: Drawing Resonance Structures
Replies: 3
Views: 27

Drawing Resonance Structures

On the test, are we supposed to draw all the resonance structures even if it is not stated in the question?
by PriscillaLi_3G
Wed Oct 23, 2019 11:22 am
Forum: DeBroglie Equation
Topic: Velocity
Replies: 12
Views: 57

Re: Velocity

You should assume that a velocity > 3x10^8 is unreasonable
by PriscillaLi_3G
Wed Oct 23, 2019 11:21 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Atomic Radius
Replies: 18
Views: 78

Re: Atomic Radius

A visual of the atomic radius trend in the periodic table: https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=2ahUKEwiqvKfK_7LlAhXEIjQIHTMEBPIQjRx6BAgBEAQ&url=https%3A%2F%2Fcourses.lumenlearning.com%2Fcheminter%2Fchapter%2Fperiodic-trends-atomic-radius%...
by PriscillaLi_3G
Wed Oct 23, 2019 11:19 am
Forum: Trends in The Periodic Table
Topic: Ionization Energy
Replies: 8
Views: 65

Re: Ionization Energy

As you take away an electron, you have the same positive energy power holding onto less electrons, so each electron gets a stronger pull, which makes it harder to take away a second, third, etc. electron
by PriscillaLi_3G
Wed Oct 23, 2019 11:18 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: s, p, d, f orbitals
Replies: 15
Views: 69

Re: s, p, d, f orbitals

so at each energy level, are there s- p- d- f- orbitals?
by PriscillaLi_3G
Wed Oct 23, 2019 11:17 am
Forum: *Black Body Radiation
Topic: What is it?
Replies: 6
Views: 57

Re: What is it?

It won't be tested!
by PriscillaLi_3G
Wed Oct 23, 2019 11:15 am
Forum: *Shrodinger Equation
Topic: Wave functions
Replies: 9
Views: 56

Re: Wave functions

So is the wave function related to the quantum numbers n, l, and ml?
by PriscillaLi_3G
Wed Oct 16, 2019 3:35 pm
Forum: Einstein Equation
Topic: Units
Replies: 17
Views: 548

Re: Units

Is it necessary that we put in the units while showing our work?
by PriscillaLi_3G
Wed Oct 16, 2019 3:33 pm
Forum: Einstein Equation
Topic: E=hv
Replies: 41
Views: 1362

Re: E=hv

E represents the energy of the photon.
by PriscillaLi_3G
Wed Oct 16, 2019 3:31 pm
Forum: Photoelectric Effect
Topic: Photoelectric effect
Replies: 5
Views: 33

Re: Photoelectric effect

Different metals will require different levels of energy to break the electron away from the metal atom.
by PriscillaLi_3G
Wed Oct 16, 2019 3:26 pm
Forum: Properties of Light
Topic: Constant for Speed of Light
Replies: 14
Views: 62

Re: Constant for Speed of Light

Lavelle generally uses 3.0 x 10^8 in class so I believe that is fine.
by PriscillaLi_3G
Wed Oct 16, 2019 3:25 pm
Forum: Photoelectric Effect
Topic: Particle vs. Wave Model
Replies: 5
Views: 25

Particle vs. Wave Model

I was confused about how both the particle and wave models come together to model light. Is it that light is a particle and the flow of the particles (photons) are in a wave?
by PriscillaLi_3G
Fri Oct 11, 2019 11:32 am
Forum: Empirical & Molecular Formulas
Topic: Decimals to Whole Numbers
Replies: 6
Views: 66

Re: Decimals to Whole Numbers

How far away from the whole number can the number be to still be able to round? Like, if I got 1.89, could I round that to 2?
by PriscillaLi_3G
Fri Oct 11, 2019 11:30 am
Forum: Balancing Chemical Reactions
Topic: Fractions
Replies: 17
Views: 81

Re: Fractions

Don't leave the coefficients as fractions.
by PriscillaLi_3G
Fri Oct 11, 2019 11:29 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Accuracy and Precision
Replies: 8
Views: 32

Accuracy and Precision

Why is the accuracy vs. precision concept relevant to the chemistry we are learning right now?
by PriscillaLi_3G
Fri Oct 11, 2019 11:28 am
Forum: Significant Figures
Topic: Answer being a tad bit off
Replies: 8
Views: 88

Re: Answer being a tad bit off

How far off is too far off?
by PriscillaLi_3G
Fri Oct 11, 2019 11:27 am
Forum: Significant Figures
Topic: Sig Figs in % Yield
Replies: 10
Views: 91

Re: Sig Figs in % Yield

When I am solving a problem, do I have to keep in mind the sigfigs throughout all the calculations? Or just keep the right sigfigs for the final answer.
by PriscillaLi_3G
Thu Oct 03, 2019 9:53 pm
Forum: Significant Figures
Topic: No numbers in problem?
Replies: 3
Views: 41

No numbers in problem?

How many sig figs would you put if the original problem had no numbers in it to base your sig figs off of?
by PriscillaLi_3G
Thu Oct 03, 2019 9:50 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Avogadro's Number?
Replies: 16
Views: 110

Re: Avogadro's Number?

How do you know when to multiply using Avogadro's number and when to divide?
by PriscillaLi_3G
Thu Oct 03, 2019 9:45 pm
Forum: Molarity, Solutions, Dilutions
Topic: Gaseous Mixtures
Replies: 2
Views: 23

Re: Gaseous Mixtures

I take it that the term "gaseous solution" just isn't correct terminology.
by PriscillaLi_3G
Thu Oct 03, 2019 9:41 pm
Forum: SI Units, Unit Conversions
Topic: Question about Showing Work
Replies: 22
Views: 137

Re: Question about Showing Work

I think show your work in case you can get partial credit?
by PriscillaLi_3G
Thu Oct 03, 2019 9:40 pm
Forum: Limiting Reactant Calculations
Topic: Homework Week 1
Replies: 18
Views: 129

Re: Homework Week 1

Am I supposed to choose the 5 problems so that I do one from each topic?

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