Help Bonding Homework

[monica_]

I'm stuck with two questions

1. Explain how isotopes differ from allotrope, using carbon as an example.

2. Describle the structure of the following substances in the solid state. Pay special attention to all bond types present, and draw valence structures where appropriate.
HF
KF
Cu
F2
diamond

[random_person]

1. Explain how isotopes differ from allotrope, using carbon as an example.

[random_person]

2. Describle the structure of the following substances in the solid state. Pay special attention to all bond types present, and draw valence structures where appropriate.
HF
KF
Cu
F2
diamond

[monica_]

thank you

[Mao]

2. Describle the structure of the following substances in the solid state. Pay special attention to all bond types present, and draw valence structures where appropriate.
HF
KF
Cu
F2
diamond

Wait, where did you get this question?

Solid, intermolecular structures for HF and F2 are close-packing structures that I wouldn't expect high school students to have ever heard of. Same goes for the structure of Cu (we know that metals are in a lattice, but VCE doesn't teach what kind of lattice).

It's very strange to see a question like this at the VCE level...

[monica_]

Wait, where did you get this question?

Solid, intermolecular structures for HF and F2 are close-packing structures that I wouldn't expect high school students to have ever heard of. Same goes for the structure of Cu (we know that metals are in a lattice, but VCE doesn't teach what kind of lattice).

It's very strange to see a question like this at the VCE level...

I got this question from my unit 1 chem booklet "Resource Book" from my school with all the work and assignments I'm expected to complete listed in it as well.

[thushan]

Wait, where did you get this question?

Solid, intermolecular structures for HF and F2 are close-packing structures that I wouldn't expect high school students to have ever heard of. Same goes for the structure of Cu (we know that metals are in a lattice, but VCE doesn't teach what kind of lattice).

It's very strange to see a question like this at the VCE level...

I guess they want a simplified version, Mao.

[Mao]

I guess they want a simplified version, Mao.

Yeah, I guess.

But here's the thing that annoys me. With VCE knowledge, there is no way to actually deduce the structure of solids, especially not for those that have weak intermolecular forces. The only experience students have had is with NaCl-like square lattices. Asking this kind of question only invites over-simplifications and bad reasoning.

I got this question from my unit 1 chem booklet "Resource Book" from my school with all the work and assignments I'm expected to complete listed in it as well.

I am quite interested in what your teachers think is the "correct" answer for this questions.

[monica_]

I am quite interested in what your teachers think is the "correct" answer for this questions.

My teacher wrote that there were bonding between molecules, h-bonding and dispersion forces for HF, non-polar = dispersion forces between molecules for F2.

[Mao]

My teacher wrote that there were bonding between molecules, h-bonding and dispersion forces for HF, non-polar = dispersion forces between molecules for F2.

Okay, I see.

The question should say is "Describle the intermolecular forces present in the following substances in the solid state." Structure is quite a different concept altogether.