2coolweir 2coolweir

29-07-2019
Chemistry

contestada

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

Respuesta :

esa4321 esa4321

03-08-2019

Answer:

calcium

Explanation:

Answer Link

emmarose24 emmarose24

21-10-2020

Answer:

C

Explanation:

calcium

Answer Link

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