Are they Hard to Pull the Atoms in the Molecule Apart? Is it hard to Separate the Molecules?

-It is very hard to Split up the Molecule it self, because of the Strong Attraction of Forces for that Electron -But the Molecules Forces with Other Molecules in the Simple Molecule have a Weak Force of Attraction [Known as Intermolecular Forces] and these forces determine how Easy it is to Change the State -So the Melting and Boiling Point is very low, compared to Ionic Bonding. That's why most of the Simple Molecules are Gases or Liquids.