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How to find valency and molecular …

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How to find valency and molecular mass

Posted by Bharti Rani 3 years, 7 months ago

CBSE > Class 09 > Science

3 answers

Ayush Sharma 3 years, 6 months ago

The valency can be calcualted by electronic configuration- 1s²,2s²,2p⁶, 3s²,3p⁶,4s²,3d¹⁰,,..... For ex ample in the case of oxygen it has atomic no.-8, So from the above formula(electronic configuration) Oxygen-8(atomic no.) 1s²,2s²,2p⁴ 2,2+4=2,6 Thus ,no. Of eletrons in the last shell is called valency so, 6 is valency

Krisha Shah 3 years, 6 months ago

The maximum no. Of electrons an element can either gain, loose or share as per its energy is called valence. Molecular mass is simple. It is the mass(atomic mass) of all the molecules of an element .

Naman Singh 3 years, 7 months ago

Given the valence of two elements, find the least common multiple of the absolute value of the valence. Then divide the least common multiple by the absolute value of the valence to find the number of atoms in the molecule. (2) The oxygen element usually shows -2 valence.29-Jan-2020

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