Atom or group of atoms having a charge are called _______.

The number of atoms present in a molecule is called its ________.

An atom or a group of atoms which is responsible for chemical characteristics of an organic compound is called _________ .

If a molecule is made of similar kind of atoms , then it is called _________ atomic molecules .

The sum of the numbers of protons and neutrons of an atom is called its _______.

The number of atoms present in a molecule is called its ____.

The mass of an atom is concentrated in its central part called_________.

The smaller particles found in the atom is called _______.

Atoms of same elements with same atomic number are called ________.