Question

what concept was used to finding the atomic mass of elements and why​

Answer 1

:Atomic mass of an element is sum of their protons and neutrons.

in many cases no. of protons is equal to no. of neutrons.

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Answer 2

Answer:

For even number double the atomic number

For odd number double +1 the atomic number

Except berellyium and few 2 or3 elements

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