ICSE

A chemical equation tells us what substances are involved in a given reaction is called reactants.

A chemical equation is the symbolic representation of a chemical reaction using the symbols and formulae of the substances involved in the reaction.

The molecule of a compound is usually made up of two parts and these parts are separately known as radicals.

The symbolic representation of a molecules is known as formula.

The electrons in the outer most shell of the atom are known as valence electrons .

The valency of an elements is a measure of its combining power with other elements.

It represents : Name of the element One atom of the element A definte mass of the element.

A symbol is the short form that stands for the atom of a specific element or the abbreviation used for the name of an element.

A molecule is the smallest particle that has has the capability to exist independently.

The elements having eight atoms in their molecules , e.g. S8 .