There is _______ oxygen atom is water molecule.

There are _________ hydrogen atoms in water molecule.

Water is a _____ molecule.

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

The distance between the centres of carbon and oxygen atoms in the gas molecule is 1.13 Å . The centre of mass of the molecule relative to oxygen atom is

Ozone consists of __________ oxygen atoms.