What is a retroactive molecule?

Yes, water is a bend molecule with a bond angle of about 105 degrees. They are described as bent planar (or V shaped)

if you mean the transfer rate of heat ?; the heat transfer rate depends on the atom or molecule type .

Air molecules is a little vague, the air that we breath is a mixture of mainly nitrogen (72% or so) oxygen and carbon dioxide. A water molecule is H20, two hydrogen polar covalently bonded to one...

Different elements have different electro-negativities. Electro-negativity is the ability of an atom to withdraw 'electron density' towards itself, i.e. it makes electrons come closer to it. Fluorine...

Everything has gravity, even one molecule.