1.

Elements have been arranged in the following sequence on the basis of their increasing atomic masses. F, Na, Mg, Al, Si, P, S, Cl, Ar, K (i) Pick two sets of elements which have similar properties. (ii) The given sequence represents which law of classification of elements?

Answer» (a) (i) F and Cl

(ii) Na and K

(b) Newlands’ Law of Octaves


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