How to find valency and molecular mass

1.	How to find valency and molecular mass
Answer» The valency can be calcualted by electronic configuration- 1s²,2s²,2p⁶, 3s²,3p⁶,4s²,3d¹⁰,,..... For example in the case of oxygen it has atomic no.-8, So from the above formula(electronic configuration) Oxygen-8(atomic no.)1s²,2s²,2p⁴2,2+4=2,6Thus ,no. Of eletrons in the last shell is called valency so, 6 is valency 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 . Given the\xa0valence\xa0of two elements,\xa0find\xa0the least common multiple of the absolute value of the\xa0valence. Then divide the least common multiple by the absolute value of the\xa0valence\xa0to\xa0find\xa0the number of atoms in the\xa0molecule. (2) The oxygen element usually shows -2\xa0valence.29-Jan-2020

Discussion