CHEMISTRY COMMUNITY

AJ Manzano 3K

Hello, are we going to have to know how to calculate the bond length between atoms/molecules? Like I know the higher bonds are shorter but will we need to calculate a numeric value for it? If so, how would we do that? Thank you.

AJ Manzano 3K

I find knowing how the actual shape looks like to be really helpful as it gives a clue onto the shape's name. For example a trigonal planar (AX3) looks like a triangle on a single plane, while a square pyramid (AX5E) looks like a pyramid with a square base if you connect the atoms (not the lone pair...

AJ Manzano 3K

Electron density refers to any regions that have electrons or atoms. This helps determine the overall structure. However, when identifying the molecular shape with regards to VSEPR, only the atoms are taken into account.

AJ Manzano 3K

Regarding bond angles, is that something we will ever be asked to calculate, or do we just remember them?

AJ Manzano 3K

I'm pretty sure we are going to have to know the angles as well as the name of the shapes.
The VSEPR (Valence Shell Electron Pair Repulsion) model explains the experimentally observed shape of molecules. Basically, this is how the molecule would be structured in a 3 dimensions (real life).

AJ Manzano 3K

I was told the TAs check every Sunday but I'm not sure

AJ Manzano 3K

How do we know the difference between a dipole and an induced dipole? Is it something we have to solve for ourselves in a problem, or is that something we just have remember?

AJ Manzano 3K

I know Cu ([Ar] 3d^10 4s^1) and Cr ([Ar] 3d^5 4s^1) are the exceptions to the electron configuration because the 3d subshell is trying to be more stable by being half- or completely full. Because the groups (columns) indicate the number of valence electrons, would the other elements in group 6 and 1...

AJ Manzano 3K

An empty 4s has lower energy than an empty 3d. However, when they're filled 4s has a higher energy than 3d. Hence the reason why you write 3d before 4s in the final configuration.

AJ Manzano 3K

When could the octet rule be broken? In Wednesday's lecture, Dr. Lavelle drew the Lewis structure for phosphorus pentachloride (PCl5), and 5 chlorine atoms were attached to one phosphorus. Why can Phosphorus have 5 bonds instead of 4?

AJ Manzano 3K

Frequency is a curvy v (usually it’ll be italicized in print)
Velocity is a normal print v (warning: if you capitalize this one then it’ll mean volume)

AJ Manzano 3K

What exactly is intensity in comparison to energy? I know it’s like making the lights brighter while the type of light stays the same. So how does it become brighter if the energy doesn’t increase? Energy is related to wavelength, but how does intensity relate?

AJ Manzano 3K

As distance between the electron (q2) and the nucleus (q1) increases, the electrostatic tension decreases. This is because the electrons closer to the nucleus (q1) will block off some of the energy from reaching the electron (q2). Dr. Lavelle likened this to standing by a fire for warmth. As you (q2...

AJ Manzano 3K

For me, it helps when I picture them on the periodic table because, with the exception of Hydrogen, the other six elements (C, N, O, F, Cl, Br, I) border the top right hand corner of the table next to the column of noble gases.

AJ Manzano 3K

Use the full number given, as it typically cuts off at the thousandths place. Then round to the thousandths at the very end of your calculations.

AJ Manzano 3K

I took chemistry in sophomore year of high school, but it was mainly a worksheet type class more based on completion than anything else, so I'm pretty rusty as well. I've attended the Peer Learning Facilities with the UAs though and that really seems to help as you can ask any questions you want and...

CHEMISTRY COMMUNITY

Search found 16 matches

Bond Length on test/exam??

Re: Molecular Shape

Re: Electron Density vs Shape?

Will we have to calculate bond angles?

Re: What to memorize in VSEPR?

Re: Chemistry Community Posts

Induced Dipole vs Dipole

More exceptions for electron configurations??

Re: s,p,d,f

Why does PCl5 break the Octet Rule?

Re: The symbol v?

Intensity vs energy

Re: Electrostatic Potential Energy Example

Re: diatomic elements

Re: Periodic Table

Re: Rusty on High School Chem [ENDORSED]