Question: As most of atoms are empty space (ie imbetween electron and nucleus) how come we dont just drift through other objects?

Alexander Henderson answered on 10 Mar 2015:

At the atomic level, strong electrostatic forces exist between the protons in the nucleus and the surrounding electrons. It is not favourable for anything to be in this space. Equally, strong forces of attraction exist between some atoms in the form of bonds (ie in molecules). Now, molecules are very different; you can put your hand in a bucket of water but not through a metal object. Some molecules attract each other strongly (giving solids), some attract each other less strongly giving liquids and gases.