Search found 20 matches
- Sun Oct 27, 2019 1:26 pm
- Forum: Student Social/Study Group
- Topic: Study Tips
- Replies: 58
- Views: 2106
Re: Study Tips
I've been watching youtube videos that pertain to specific topics I'm confused about. Sometimes it's tricky to find really good ones but I find it really helpful to see someone else explain specific topics I need review on since you can rewatch them.
- Sun Oct 27, 2019 1:23 pm
- Forum: Ionic & Covalent Bonds
- Topic: Midterm Topics Covered
- Replies: 7
- Views: 117
Re: Midterm Topics Covered
I'm not completely sure if the new material we've been learning this week is going to be on the midterm but I was planning on either asking my TA or during one the midterm review sessions that are being planned
- Sun Oct 27, 2019 1:14 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: hw problem 2A.5
- Replies: 1
- Views: 43
hw problem 2A.5
the solutions manual states that the electron configuration for Ga^3+ is [Xe] 4f^14 5d^10 6s^2. why is an electron taken from the f orbital instead of the s orbital to make the d orbital more stable?
- Sun Oct 27, 2019 12:51 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: d5 in electron configurations
- Replies: 1
- Views: 34
d5 in electron configurations
For the ion Ru3+ the solutions manual states that the electron configuration is [Kr]4d^5 instead of [Kr]4d^35 s^2. Can someone explain why the orbitals are taken from the s orbital instead of the d orbital?
- Thu Oct 24, 2019 9:12 pm
- Forum: DeBroglie Equation
- Topic: hw problem 1B.23
- Replies: 4
- Views: 83
hw problem 1B.23
problem: What is the velocity of a neutron of wavelength 100. pm?
when we are given the wavelength in pm or any other unit, do we need to change it to nm before we plug it into our equation?
when we are given the wavelength in pm or any other unit, do we need to change it to nm before we plug it into our equation?
- Sun Oct 20, 2019 4:03 pm
- Forum: Photoelectric Effect
- Topic: hw 1B.15 part c
- Replies: 3
- Views: 70
Re: hw 1B.15 part c
Thank you for explaining that clearly!
For part d, how would I determine the kind of electromagnetic radiation that was used?
For part d, how would I determine the kind of electromagnetic radiation that was used?
- Sun Oct 20, 2019 3:50 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configuration Exceptions
- Replies: 5
- Views: 71
Re: Electron Configuration Exceptions
the 2 exceptions we need to know for electrong configurations are:
Chromium, Cr: [Ar]3d^54s^1 and Copper, Cu: [Ar] 3d^104s^1
but I also need some clarification on why these exceptions exist.
Chromium, Cr: [Ar]3d^54s^1 and Copper, Cu: [Ar] 3d^104s^1
but I also need some clarification on why these exceptions exist.
- Sun Oct 20, 2019 3:35 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Opposite Spin
- Replies: 5
- Views: 89
Re: Opposite Spin
The Pauli Exclusion Principle states that no two electrons can share the same combination of four quantum numbers. The electrons in an orbital must have opposite spins in order for their quantum numbers to differ. Since their n, l, and ml are the same, their ms (which refers to the spin of the elect...
- Sat Oct 19, 2019 2:43 pm
- Forum: Photoelectric Effect
- Topic: hw 1B.15 part c
- Replies: 3
- Views: 70
hw 1B.15 part c
Problem: The velocity of an electron that is emitted from a metallic surface by a photon is 3.6 x 10^3 km.s^-1. (a) What is the wavelength of the ejected electron? (b) No electrons are emitted from the surface of the metal until the frequency of the radiation reaches 2.50 3 1016 Hz. How much energy ...
- Thu Oct 17, 2019 6:49 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: hw problem 1D.21
- Replies: 2
- Views: 39
hw problem 1D.21
problem: Write the subshell notation (3d, for instance) and the number of orbitals having the following quantum numbers: (a) n=5, l=2; (b) n=1, l=0; (c) n=6, l=3; (d) n=2, l=1. I know that to get the number of orbitals you use 2(l)+1 but can someone explain to me how to get/write the subshell notati...
- Sun Oct 13, 2019 8:25 pm
- Forum: Properties of Electrons
- Topic: constructive vs destructive interference
- Replies: 3
- Views: 48
constructive vs destructive interference
Can someone explain the difference between constructive and destructive interference and the importance of both?
- Sun Oct 13, 2019 8:14 pm
- Forum: Properties of Light
- Topic: hw problem 1A.7
- Replies: 3
- Views: 46
hw problem 1A.7
Problem: (a) The frequency of violet light is 7.1 x 10^14 Hz. What is the wavelength (in nanometers) of violet light?
The solution manual shows that 2.998 x 10^8 m.s^-1 is divided by the frequency but I don't know where they got the "2.998 x 10^8 m.s^-1" from
The solution manual shows that 2.998 x 10^8 m.s^-1 is divided by the frequency but I don't know where they got the "2.998 x 10^8 m.s^-1" from
- Sun Oct 13, 2019 7:53 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: steps for electron transitions
- Replies: 1
- Views: 38
steps for electron transitions
Can somebody outline some clear steps on how to calculate electron transitions for the H-atom spectrum?
- Sun Oct 13, 2019 7:51 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Blamer and Lyman
- Replies: 1
- Views: 40
Blamer and Lyman
What is the difference between the Blamer and Lyman series?
- Sun Oct 13, 2019 7:48 pm
- Forum: Properties of Light
- Topic: electron ejection
- Replies: 1
- Views: 27
electron ejection
Can someone explain to me the kind of wavelengths that can and can’t eject electrons and why this is so?
- Sun Oct 06, 2019 6:35 pm
- Forum: Empirical & Molecular Formulas
- Topic: Rounding vs. Multiplying
- Replies: 4
- Views: 80
Re: Rounding vs. Multiplying
I would say to round off when the decimal is between one point of different ex. 1.1 to 1, the others should probably be multiplied.
- Sun Oct 06, 2019 6:29 pm
- Forum: Limiting Reactant Calculations
- Topic: Finding the limiting reaction
- Replies: 3
- Views: 89
Re: Finding the limiting reaction
Some steps I wrote down: - write the balanced equation - calculate the molar mass of each reactant and product - convert the known masses of the reactant and product to moles - compare calculated moles to required moles to determine if there is a limiting reactant The limiting reactant is going to b...
- Sun Oct 06, 2019 6:21 pm
- Forum: Balancing Chemical Reactions
- Topic: Naming compounds
- Replies: 2
- Views: 65
Re: Naming compounds
My TA recommended us to review it in the textbook in case it does come up on the test since naming elements and compounds is a chemistry fundamental.
- Sun Oct 06, 2019 6:17 pm
- Forum: Limiting Reactant Calculations
- Topic: % yield
- Replies: 5
- Views: 80
Re: % yield
The actual yield is normally listed in the problem and you're asked to find the theoretical yield through solving a stoichiometry problem. Once you have these two, you'll be able to solve for the percent yield.
- Sun Oct 06, 2019 6:09 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: sig figs
- Replies: 20
- Views: 277
Re: sig figs
Some rules for significant figures: non zero numbers are always significant, any zero between 2 non zero numbers are significant, and trailing zeros after a decimal point are significant.