Explain Newlands law of octaves giving examples.

Newlands Law : When the elements are arranged in increasing order of their atomic masses, the properties of the eighth element are similar to that of the first.

Examples :

1. The eight element from lithium is sodium. Similarly, eight element from sodium is potassium. Lithium, sodium, potassium have similar chemical properties.

2. The eighth element from fluorine is chlorine. Fluorine and chlorine have similar chemical properties.