4. Why are plastic blocks good for modeling molecules? There are as many different colors as there are atoms.
They can be combined in many different ways.
They come in thousands of different shapes and sizes.
They are rigid and don't easily separate.

I think it's B

lol sorry I'm not sure with my answer

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock