CHEMISTRY COMMUNITY

Arshia Ramesh 1G

you should draw the two pi bonds next to each other because pi bonds prevent rotation. they are essentially two electron density regions that are on each side of the intermolecular axis

Arshia Ramesh 1G

Joey Greco 1F wrote:Ligands must have at least 1 lone pair

why do they have to have at least one lone pair?

Arshia Ramesh 1G

the bond angle should be less than 109.5 because of the lone pair repulsion

Arshia Ramesh 1G

single bonds are the longest and the weakest, triple bonds are the shortest and strongest

Arshia Ramesh 1G

no problem!

Arshia Ramesh 1G

it also indicates the stability of a bond

Arshia Ramesh 1G

so you would write OH2 not H2O right?

Arshia Ramesh 1G

How are you able to tell the maximum number of places on the ligand that can bind simultaneously to a single metal center for CO3 2-? Do you have to draw out the lewis structure?

Arshia Ramesh 1G

thank you!!!

Arshia Ramesh 1G

okay thank you so much!!!

Arshia Ramesh 1G

When do you write (OH2) vs (H2O)? I thought since the O is the element that is bonding, you write OH2, but the solutions show that you write H2O. Can someone please explain?

Arshia Ramesh 1G

Thank you so much!

Arshia Ramesh 1G

thanks so much for the link!

Arshia Ramesh 1G

i read on one of the reviews that a pi bond is weaker than a sigma bond but why is that?

Arshia Ramesh 1G

thank you so much!

Arshia Ramesh 1G

you need energy to form bonds and energy is released when bonds are broken

Arshia Ramesh 1G

it's only with H and NOF

Arshia Ramesh 1G

Look at the electronegativity when you're trying to determine if something is polar/nonpolar

Arshia Ramesh 1G

London dispersion is one of the types of Van der waal forces.

Arshia Ramesh 1G

The further apart the two atoms are (longer bond length) the easier they are to separate or break apart

Arshia Ramesh 1G

I think if it accepts electrons is delta negative

Arshia Ramesh 1G

Why is it that chromium's electron configuration is [Ar]3d^5 4s^1? I get the [Ar] but why is it 3d^5 instead of 3d^4?

Arshia Ramesh 1G

Where is last year's midterm on ccle?

Arshia Ramesh 1G

Yes ionic bonds are always between a metal and a non metal.

Arshia Ramesh 1G

It means the charge of the element!

Arshia Ramesh 1G

Are H, He, Li, Be the only four that are exceptions?

Arshia Ramesh 1G

Can someone please explain why elements with high ionization energies are not likely to form cations and conduct electricity?

Arshia Ramesh 1G

When atoms are bound together they release energy, so they have less energy than an atom that is not bounded with another atom.

Arshia Ramesh 1G

Degenerate means that all of the orbitals of a shell have the same energy. The textbook also says (on p.36 of 6th edition) that the degeneracy orbitals with the same principal quantum number but different orbital angular momentum values is true only of the hydrogen atom and one-electron ions like he...

Arshia Ramesh 1G

Light has the both the properties of waves and of particles.

Arshia Ramesh 1G

I think C is the correct answer because frequency decreases causing a change in the wavelength which causes the slope of the wave to also decrease as a result.

Arshia Ramesh 1G

The effective nuclear charge correlates to the atomic number so the an atom with a greater pull of electrons to the nucleus will have a higher atomic number.

Arshia Ramesh 1G

I don't think that there can be two limiting reactants especially if there are only two products.

Arshia Ramesh 1G

BrINClHOF

Arshia Ramesh 1G

I usually start by writing all of the coefficients on the side of the reaction that they occur.
Then I continue balancing both sides starting with the element in the least amount.

CHEMISTRY COMMUNITY

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