Question

Atomic mass of barium is 137 u .what does it tell us

Answer 1

Explanation:

137.327

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Answer 2

Explanation:

The mass number tells us the number (the sum of nucleons) of protons and neutrons in the nucleus of an atom. The atomic number(also known as the proton number) is thenumber of protons found in the nucleus of an atom. It is traditionally represented by the symbol Z.

Since the barium has atomic mass= 137u so it has sum of 56 protons and 81 neutrons

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