PERIODIC CLASSIFICATION OF ELEMENTS

Newland’s Octaves :(Law of Octaves)

Newland states that when elements are arranged in order of increasing atomic masses, every
eighth element has properties similar to the first just like in the musical note.

This can be illustrated as given below
sa  re  ga  ma pa dha ni
Li  Be  B  C  N  O  F
Na Mg AI Si  P  S  CI

Mendeleef’s Periodic Table:

Mendeleefs Periodic Table is based upon Mendeleefs periodic law which states „The physical
and chemical properties of the elements are a periodic function of their atomic masses.”
Importance of Mendeleers Periodic Table
Few important achievements of Periodic Table are
1 Systematic study of the elements.
2. Prediction of new elements and their properties. he left space for the elements yet to be
discovered. e.g., he left spaces for Ga and Ge and named these elements as ERa-aluminium
(Ga) and EKa-silicon (Ge) respectively
3. Atomic mass correction of doubtful elements on the basis of their expected positions and
properties.