Write true or false for the following statements:

Mass of two moles of atoms or molecules is called molar mass.

Write true or false for the following statements:

A group of atoms carrying a charge are called bivalent ions.

Write true or false for the following statements:

Atomicity of phosphorus is 5 and that of sulphur is 6.

Write true or false for the following statements:

A mole always represents 6.023 x 10²² atoms or molecules or ions of a substance.

Write true or false for the following statements:

A mole always represents for gases, 22.4 litres of volume at 0°C and 1 atmospheric pressure which is known as standard temperature and pressure (STP).