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kiruha [24]
3 years ago
13

An element has an atomic number of 18 and an atomic mass of 40. The number of neutrons in the nucleus of an atom of this element

is????
Chemistry
1 answer:
Vikentia [17]3 years ago
7 0

Answer: 22 neutrons

Explanation: 40 is the mass number = atomic mass = total number of protons and neutrons in atomic nucleus

18 is the number of protons in the nucleus of this atom

Then 40 - 18 = 22 neutrons

and this is Argon

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