Question

How to find relative atomic mass

Answer 1

Atomic mass is the sum of numbers of protons and neutrons in an atom of an element

For example we are taking sodium atom

Protons= 11. And neutrons = 12

Atomic mass = number of protons +number of neutrons

Atomic mass= 11+12

So atomic mass = 23

Answer 2

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Atomic mass

Atomic mass in an atom or group of an atom is the sum of the masses of protons, neutrons and electrons.

Atomic Mass = No. of protons + No. of neutrons