A _______ is the smallest particle of an element or compound.

____ is defined as the amount of substance that contains as many specified elementary particles.

_______ is the volume occupied by one mole of any gas at STP.

____ is considered to be a divisible particle.

Electron was discovered on ____ experiment.

Atoms having same atomic number but different mass number is called

The total number of protons or electrons present in an atom is called

Who proposed the name electron?

The number of atoms present in one molecule of an element is

Atomic mass is expressed in