toshaaa1k toshaaa1k

15-12-2015
Physics

contestada

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

Respuesta :

naenae926 naenae926

15-12-2015

The answer would be Ca. Calcium

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emmarose24 emmarose24

21-10-2020

Answer:

C

Explanation:

calcium

Answer Link

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