Chemistry, asked by mayuresh7588, 11 months ago

How to remember atomic mass of a element ?

Answers

Answered by manya2028
12

Answer:

but every time we can't do the doubling..

like for chlorine , etc..

yaad he krne padenge...

【 :| 】

Answered by Anonymous
0

Explanation:

  • There's no need to learn the atomic masses of each and every elements.

  • You have to know the atomic masses of first 20 elements, some transition metals, gr 18 elements and some elements like uranium, thorium etc.

  • The atomic mass is double the atomic number of an element. But it is not applicable for all the elements in the periodic table.

  • The atomic masses of elements like He, Li, C, N, O, Ne, Si, S, Cl, Ca are double the atomic number.

  • The atomic masses of elements like Be, B, F, Na, Mg, Al, P, Ar and K are not double the atomic number.

  • For these elements just double the atomic number and add 1.

All The Very Best and Good Luck :)

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