The atomic mass of an element is expressed in grams, is known as

_____ is spherical and most of the space in its empty.

The word atom is derived from the Greek word

Volume occupied by imole of a gas at STP is

____ is considered to be a divisible particle.

Neutron was discovered by

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

Who proposed the name electron?

Atoms having same atomic number but different mass number is called

The charge of an electron was determined by