CHEMISTRY COMMUNITY

Jasmine Emtage-1J

Bond strength increases with the number of bonds, so triple bond > double bond > single bond. Bond length works in the opposite manner, with the weakest bonds being the longest bonds, so triple bond < double bond < single bond.

Jasmine Emtage-1J

Regular orbitals fill up in the typical way, with each orbital half filling (taking on only one electron) before any of them fill completely (2 electrons total) and then filling the next orbital in the same manner (Hund's Rule). Hybrid orbitals combine so that all the valence electrons are available...

Jasmine Emtage-1J

Sigma bonds allow atoms to rotate independently of each other, but pi bonds don't.

Jasmine Emtage-1J

A dipole describes the separation of charges in a molecule of covalently bonded atoms. I'm pretty sure a dipole moment is just the measurement of the separation of those opposite charges.

Hope this helps!

Jasmine Emtage-1J

An expanded octet for Xe would allow it to take on 10 extra electrons (in its d-orbital) on top of the 8 it needs for its octet. When you give it 12 electrons your really only putting 4 electrons in its d-orbital.

Jasmine Emtage-1J

How many extra electrons can atom with an expanded octet take on? Can it take on 10 extra because that's how many can fit in the d orbital?

Jasmine Emtage-1J

To answer your second question, I believe the less electronegative an element is, the more likely it is to be the central atom.

Jasmine Emtage-1J

Yes, the formal charges on each of the atoms in the molecule should add up to the overall charge of the molecule. I don't know of any exceptions, but there might be some?

Jasmine Emtage-1J

Yes, that's correct because the 3d orbital is higher in energy than the 4s orbital.

Jasmine Emtage-1J

Ionization energy is the smallest amount of energy it takes to remove an electron from an atom in the gas phase. The trend for ionization energy (I think that's what you're asking for) is that it increases as you move across a period because there are more protons in the nuclei, increasing the nucle...

Jasmine Emtage-1J

Electronegativity describes the ability of an atom to attract electrons. The more protons an atom has (as indicated by the atomic number), the better it is at attracting electrons. That's why Oxygen has a higher electronegativity than Nitrogen. As a general rule of thumb, electronegativity increases...

Jasmine Emtage-1J

I believe we can use any of the noble gases in our shorthand. Hope that helps!

Jasmine Emtage-1J

I'm not sure if we actually need to calculate whether the electron is spinning up or down but if you're given the ms value of +1/2 you should know that it means the electron is spinning up and if you're given the ms value -1/2 you should know that the electron is spinning down.

Jasmine Emtage-1J

I know we went over this in class on Friday, but I'm still unsure why the 3d state is higher in energy than the 4s state for Potassium and Calcium. Can someone explain why?

Jasmine Emtage-1J

What do chemists use to make guacamole? Avogadros

Jasmine Emtage-1J

The Paschen series ends at energy level n=3 and the Brackett series ends at energy level n=4. I don't know much more about them but I hope that helps!

Jasmine Emtage-1J

I'm a little confused as to what Dr. Lavelle meant by electrons being in circular standing waves, is that just describing the discrete energy levels of electrons?

Jasmine Emtage-1J

It's important to remember though that De Broglie can only be used with particles because they have mass, so it's not applicable to light.

Jasmine Emtage-1J

In the equation for the energy per photon, E=hv, h is Planck's constant and it's multiplied by frequency (v). I hope that helps!

Jasmine Emtage-1J

The speed of light is constant as shown by the equation 'c=(lambda)(v)'. If the frequency decreases, wavelength must increase keeping the speed the same constant value.

Jasmine Emtage-1J

To add to the previous comment, the experiment showed that high frequency light can eject electrons even if the light has low intensity. When the intensity of low frequency light was increased, the light still couldn't eject electrons from the metal surface because the frequency was the problem, not...

Jasmine Emtage-1J

I'm not sure that we'll always have to rearrange these equations, but for this problem we did because we were not given frequency (v). In order to find frequency we had to solve E=hv for v (v=E/h). The problem was asking for wavelength so we solved c=('lambda')(v) for lambda (lambda=c/v) and substit...

Jasmine Emtage-1J

Yes, wavelength is represented by lambda and frequency is represented by v

Jasmine Emtage-1J

Another tip is to balance any freestanding elements last because they're the easiest to manipulate.

CHEMISTRY COMMUNITY

Search found 24 matches

Re: Difference in bonds

Re: Hybrid Orbitals

Re: Types of Bonds

Re: Meaning of a dipole

Re: Self-Test 3.10A

Expanded Octet

Re: Electronegativity vs. Electron affinity

Re: Charge and Structures

Re: 3d before 4s

Re: 2.67

Re: electronegativity

Re: Using shorthand [Ar] [ENDORSED]

Re: Fourth Quantum Number

4s orbital lower in energy than 3d

Re: Post All Chemistry Jokes Here

Re: Balmer Series vs Lyman Series

Circular Standing Waves

Re: Wavelength and De Broglie Equation [ENDORSED]

Re: How do I use Planck's constant? [ENDORSED]

Re: HW chapter 1 question 3

Re: Photoelectric Effect Expirement [ENDORSED]

Re: formula for light problems

Re: Units for wavelengths [ENDORSED]

Re: Fastest way to balance chemical equation