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State the importance of newlands law of octaves

Posted by Simi Singh 8 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Kritika Trehan 8 years, 1 month ago

According to Newlands' law of octaves when the elements are arranged in order of increasing atomic weights then every eight element has properties similar to that of the first element.

Element	Li	Be	B	C	N	O	F
Atomic Weight	7	9	11	12	14	16	19
Element	Na	Mg	Al	Si	P	S	Cl
Atomic Weight	23	24	27	28	31	32	35.5
Element	K	Ca
Atomic Weight	39	40

In Newlands' table of elements lithium, sodium and potassium occupied places near each other. Other similar elements like fluorine and chlorine or oxygen and sulphur were placed near each other. This classification worked well with the elements with small atomic weights but failed in the case of elements with large atomic weights.

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CBSE > Class 10 > Science