Question

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

Answer 1

Answer:

When the element is barium, that means the aomic number is 56 which you see by looking for barium on a periodic table . Thus the "barium" in "barium 137" means 56 protons. And the 137 for the mass number designates 137 total protons protons plus neutrons.

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