What is the difference between atoms and molecules?

Hello Laxman, An atom is just that, a single atom, made from protons, neutrons and electrons. A molecule is a group of atoms bonded together via ionic, metallic or covalent bonding.

Hello Laxman, A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom. Atoms are basic building blocks of any matter. Combination of these atoms are molecule