## Search found 15 matches

Tue Nov 05, 2019 10:32 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Midterm
Replies: 6
Views: 201

### Re: Midterm

In regards to the midterm, I think it is important to remember/understand the concepts of the experiments.
Tue Nov 05, 2019 10:27 pm
Forum: Electronegativity
Topic: Ionization Energy
Replies: 3
Views: 50

### Re: Ionization Energy

Since an electron is being added to an already half full orbital in oxygen, this results in electron electron repulsion, which lowers the ionisation energy. Nitrogen also has the added stability of a half filled shell of electrons in the 2p shell.
Tue Nov 05, 2019 10:17 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Quantum Numbers Question
Replies: 4
Views: 144

### Re: Quantum Numbers Question

The number of electrons that can occupy a given energy shell is given by the equation e−=2n^2. n represents the principal quantum number that describes the energy shell. We have n=4 which means that the number of e− is 2⋅4^2=32.
Tue Nov 05, 2019 10:02 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Dino Nuggets 13d
Replies: 2
Views: 125

### Re: Dino Nuggets 13d

Although Sc2+ and K have the same number of electrons, their electron configurations are different and that is why they don't have the same valence shell electron configuration.
Tue Nov 05, 2019 9:53 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg Problem
Replies: 3
Views: 157

### Heisenberg Problem

An e- moving near an atomic nucleus has speed 6x10^6$\pm$1% m/s.
How do you find the uncertainty of its position?
Tue Nov 05, 2019 7:40 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: D Subshell
Replies: 7
Views: 199

### D Subshell

What is the maximum number of electrons that the d subshell can hold? Why?
Tue Nov 05, 2019 7:29 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8042
Views: 1412150

### Re: Post All Chemistry Jokes Here

What happened to the man stopped for having sodium chloride and a 9-volt in his car? He was booked for a salt and battery.
Tue Nov 05, 2019 7:24 pm
Forum: Properties of Electrons
Topic: Midterm Practice Test #11
Replies: 1
Views: 174

### Midterm Practice Test #11

11. a) An excited hydrogen atom undergoes an electronic transition from n=3 to n=1. Calculate the frequency of the photon emitted. 11. b) If a hydrogen electron goes from n=6 to n=4, will ∆E be negative or positive? Will the energy of the photon emitted be negative or positive? I missed the end of t...
Tue Nov 05, 2019 7:06 pm
Forum: Properties of Light
Topic: 4b practice midterm
Replies: 11
Views: 901

### Re: 4b practice midterm

For this problem, you must use the De Broglie equation. De Broglie is typically used for an electron's wavelength with mass, while c=λν or E=hv is used for massless particles, like photons.
Sun Oct 20, 2019 9:43 pm
Forum: Trends in The Periodic Table
Replies: 7
Views: 122

How do you find the atomic radius of an element?
Sun Oct 06, 2019 3:39 pm
Forum: Ideal Gases
Replies: 147
Views: 104683

I too get a bit intimidated by reading the textbook. However, doing so is extremely helpful. To make it easier for myself, I split my reading into different chunks and take breaks in between so I won’t be so overwhelmed by all of the material at once. Sometimes, I also take notes on my computer abou...
Sun Oct 06, 2019 3:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 217
Views: 115272

### Re: Advice from a Medical Student[ENDORSED]

Wow! Thank you so much for your insight. As a currently overwhelmed STEM student, this is very helpful.
Sun Oct 06, 2019 3:31 pm
Forum: Student Social/Study Group
Topic: Chemistry News
Replies: 73
Views: 49615

### Re: Chemistry News

Chemists possibly found a fix for insoluble drugs:
https://phys.org/news/2019-10-chemists- ... drugs.html
Sun Oct 06, 2019 3:25 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg equation [ENDORSED]
Replies: 73
Views: 3741

### Re: Rydberg equation[ENDORSED]

The Rydberg formula, by definition, is a mathematical formula which predicts the wavelength of light coming from an electron moving between energy levels of an atom according to the science website, ThoughtCo.
Sun Oct 06, 2019 3:19 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 135
Views: 33642

### Re: Final Jitters

I also struggle with nerves before a big exam, some of the things I do to prepare include: 1.Getting a good night's sleep before the day of! 2. Having a healthy breakfast 3. Read the material right before class so it is fresh in my mind (and obviously study lots beforehand). 4. Tell myself how I hav...