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mina [271]
4 years ago
9

A single atom of an element has 21 neutrons, 20 electrons, and 20 protons. Which element is it?

Physics
2 answers:
olga55 [171]4 years ago
8 0
The answer would be Ca. Calcium
Vladimir79 [104]4 years ago
6 0

Answer:

C

Explanation:

calcium

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