All of the symbols of elements given below were proposed by _________.
A part of the early classification of elements has been given below :
H Li Be B C N O
F Na Mg Al Si P S
(a) Which law of classification of elements is illustrated by the above arrangement of elements?
(b) Name the scientist who proposed such a classification of elements.
(c) Why is such a classification of elements compared with a characteristic of musical scale?
(d) State one limitation of this classification of elements.
Amongst all, which of the following is a non-metal. {The letters do not represent the symbols of the elements}