___________is the smallest particle of an element which can take part in a chemical reaction.

Separation of a solid non-volatile constituent of a mixture from its liquid constituent by allowing the solvent to vapourize completely is  the basic principle of _____________.

____________is the basic principle of chromatography.

___________occupies space and has mass.

_____________is a metal exist as a liquid at room temperature.

The positively charged ions are called

A mixture of carbon dioxide and oxygen can be separated by___________method.