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REY [17]
3 years ago
7

What is the mass of an element with 78 protons and 78 neutrons

Chemistry
2 answers:
stepan [7]3 years ago
8 0
Mass number=number of protons+number of neutrons
so mass number of the element you stated = 78+78 = 156 au
Reika [66]3 years ago
4 0
156. Atomic mass if the number of protons and neutrons within an atom.
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