1.

Explain Newland’s law of octaves?

Answer»

Newlands arranged elements in the increasing order of atomic mass. He noticed that every eighth element has properties similar to those of the first elements. But this peculiarity could be noticed in elements upto calcium only.

Octaves of Newlands

 Element Li Be B C N O F
Atomic Mass 7 9 11 12 14  16 19
Element Na Mg Al Si P S Cl
 Atomic mass 23 24 27 29 31 32  35.5
Element KCa
Atomic mass 39 40


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