CHEMISTRY COMMUNITY

Lauren Tindall

In regards to the midterm, I think it is important to remember/understand the concepts of the experiments.

Lauren Tindall

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.

Lauren Tindall

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.

Lauren Tindall

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.

Lauren Tindall

An e- moving near an atomic nucleus has speed 6x10^6 $\pm$ 1% m/s.
How do you find the uncertainty of its position?

Lauren Tindall

What is the maximum number of electrons that the d subshell can hold? Why?

Lauren Tindall

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.

Lauren Tindall

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...

Lauren Tindall

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.

Lauren Tindall

How do you find the atomic radius of an element?

Lauren Tindall

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...

Lauren Tindall

Wow! Thank you so much for your insight. As a currently overwhelmed STEM student, this is very helpful.

Lauren Tindall

Chemists possibly found a fix for insoluble drugs:
https://phys.org/news/2019-10-chemists- ... drugs.html

Lauren Tindall

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.

Lauren Tindall

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...

CHEMISTRY COMMUNITY

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