Elements are the pure substances and there are 118 elements in toto on earth. Lithium is the lightest element on earth with density of only 0.533 units. 94 elements are found naturally on earth and out of 118 about 80 elements are stable while elements with more than 83 or more atomic numbers are unstable. Here are the top ten lightest elements on earth with their discoverers and density.

No. Element Discoverer Country Discovered Year Density
1.

Lithium

J.A Arfvedson — Sweden
1817 0.533
2.

Potassium

Sir Humphry Davy — UK 1807 0.859
3.

Sodium

Sir Humphry Davy 1807 0.969
4.

Calcium

Sir Humphry Davy 1808 1.526
5.

Rubidium

R.W. Bunsen/G. Kirchoff, Germany 1861 1.534
6.

Magnesium

Sir Humphry Davy 1808+ 1.737
7.

Phosphorus

Hennig Brandt, Germany 1669 1.825
8.

Beryllium

F. Wohler, Germany/ A.A.B. Bussy, France 1828* 1.846
9.

Caesium

R.W. Bunsen/G. Kirchoff 1860 1.96
10.

Sulphur

Prehistoric 2.070
July 2, 2010 | Mohsin Ali | 1 Comment | 921 views