State Newlands' law of octaves.

Explanation

Newlands' octaves:
i. Newlands correlated the atomic masses of elements to their properties in a different way.
ii. He arranged the elements known at that time in an increasing order of their atomic masses.
iii. This arrangement started with the lightest element hydrogen and ended up with thorium.
iv. He found that every eighth element had properties similar to those of the first element as observed in octaves of music.
Example: Sodium is the eighth element from lithium and both have similar properties.
[ Note: Newlands' octaves are based on the seven main notes of music system . The seven notes in Indian music system are Sa, Re, Ga, Ma, Pa, Dha, Ni and the seven notes in western music system are Do, Re, Mi, Fa, So, La, Ti . The frequency of the notes goes on increasing from one note to the other . The note 'Sa' or 'Da' having double the original frequency come again at the eighth place . This forms the octave of musical not.]