Define atomic number, atomic weight and atomic mass.

Atomic number shows the number of protons in the nucleus of an atom.
Atomic weight shows the is an another term for atomic mass, which means It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.

If there were no memes, there would be no life.

Ithink due to shortage of water