CHEMISTRY COMMUNITY

Yuting Zhu 3D

I was also wondering about how to determine the number after the name?

Yuting Zhu 3D

Do we need to know the exceptions to the trends of Period Tables. Such as Oxygen has a lower ionization energy than Fluorine?
If so, could someone please help me with listing out which ones are we suppose to memorize?
Thank you!

Yuting Zhu 3D

Just adding to that, temperature is the most determining factor of the characteristic of the gas.

Yuting Zhu 3D

I think it just depends on the facts you are given in the problem. When you are given concentrations of gases, you are using Kc, while if you are given the partial pressures, then you should use Kp.

Yuting Zhu 3D

Could someone please tell me in what cases are we gonna use partial pressure in problems of ideal gases?

Yuting Zhu 3D

To answer the question, "Do radical electrons count as a region of electron density?"
Yes, it is counted as a high electron density region and can be treated like a lone pair.

Yuting Zhu 3D

The electron arrangement and the molecular shape are two different things since the molecular shape only considers atoms but not lone pairs.
The electron arrangement could be trigonal bipyramidal. But could it also be octahedral with four lone pairs? Can someone answer that for me?

Yuting Zhu 3D

Could someone please help me with how to determine whether a molecule is polar or not? Is there an easy way to do it?

Yuting Zhu 3D

Also, hybridization can form more stable and orbitals are lower in energy.

Yuting Zhu 3D

This is a general way. However, the most accurate way to determine whether the bond is covalent or ionic is to check the electronegativity difference.If the difference is less than 1.5, it is covalent, and if it is larger than 2, it is ionic. Hope this helps!

Yuting Zhu 3D

The inner core also consists of electrons in other energy levels surrounding the nucleus.

Yuting Zhu 3D

Also, to add on, Hamilton is a double derivative.

Yuting Zhu 3D

I am just really confused about the Particle in the box concept in general. Could someone explain to me why there's only a certain range of wavelength is allowed in the box? And also, how does that link to Quantum World?

Yuting Zhu 3D

When you see it on quizzes or tests, they basically mean the same thing. When light hit the surface, the photon energy (from the light source) has to be bigger or equal to work function/threshold energy in order to remove the electron.

Yuting Zhu 3D

Yes, lone pairs are definitely valence electrons. However, they do not have bonds, so you don't have to divide them by two. In order to utilize this formula, I believe that you should be able to draw the lewis structure. Hope this helps!

Yuting Zhu 3D

When an element or compound is in it's aqueous state, it means that it is dissolved in a solvent, and became a solution.
However, when an element or compound has to reach its boiling point in order to be in its liquid state.
So there is a huge difference here.

Yuting Zhu 3D

I understand how both Lyman and Balmer Series are special groups of lights that matches with the energy level difference. But could someone explain more about it for me? Why is it Significant? What kind of problems will ask you to use the properties of these two series?

CHEMISTRY COMMUNITY

Search found 17 matches

Re: Test 4

Exceptions to the trends of Periodic Tables

Re: Temperature in PV=nRT

Re: Kp and Kc

Re: Partial Pressure

Re: Radicals

Re: 180degrees and lone pairs?

Polar and non-polar molecules

Re: Hybridization significance

Re: How to easily tell between Ionic and Covalent bonds?

Re: Core, Closed shell, and valence electrons

Re: Hψ

Particle in the box: Wavelength [ENDORSED]

Re: Work Function vs. Threshold Energy [ENDORSED]

Re: Formal Charge

Re: Determining States of Matter in Reactions

Lyman and Balmer Series Significance