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CBSE - X - Chemistry

Any Easy Method to learn atomic masses of elements in the periodic table

Asked by Nihla 14th March 2017, 6:17 PM
Answered by Expert


Try to remember atomic masses of first 20 elements for class X.

Elements like like He, Li, C, N, O, Ne, Si, S, Cl, and Ca have atomic masses double the atomic number.

Elements like Be, B, F, Na, Mg, Al, P, Ar and K do not have atomic masses double the atomic number. For such elements first double the atomic number and add 1.

Answered by Expert 14th March 2017, 6:26 PM

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