Question

Which substance has molecular forces of attraction mainly due to van der Waals forces?

Sodium Chloride
Helium
Diamond
Water

Answer 1

i pretty much forgot what those forces are.

Answer 2

@Zale101

Answer 3

@butterflydreamer

Answer 4

Van Der Waals forces are responsible to keep atoms of an element or compound together. They appear in all cases, but not always they are dominant. Let us take a look at each one of those.
- NaCl is predominantly made by ionic bonds, therefore VDW forces lack.
- Diamond is predominantly made by strong covalent bonds.
- Water is predominantly made by hydrogen bonds.
- Helium is an element , plus it is a noble gas and there are no forces of attraction, meaning the predominant forces are the VDW's.

Answer 5

How do I know which is stronger or weaker?

Answer 6

seems like ionic bonds are the weakest, what trends make it stronger?

Answer 7

ionic > ion-dipole > dipole-dipole > dipole-induced dipole >london dispersion