ELEMENT

Element

       It is the simplest form of pure substance, which can neither be decomposed into nor built from simpler substances by ordinary physical and chemical methods. It contains only one kind of atoms. The number of elements known till date is 118.

[Hydrogen is the most abundant element in the universe.

Oxygen (46.6%), a non-metal, is the most abundant element in the earth crust.

Aluminium is the most abundant metal in the earth crust.

An element can be a metal, a non-metal or a metalloid.]