Question

please answer correctly
answer both questions please​

Answer 1

Answer:

Law of octaves, in chemistry, the generalization made by the English chemist J.A.R. Newlands in 1865 that, if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of seven elements.

Answer 2

Answer:

1) according to Pauli exclusion principle

2) if elements are according ly in the increaseing order of their atomic weights than every eight element will resemble the properties of that to the first elementlike in octave music