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21-01-2020
Chemistry

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

22-01-2020

Answer:

Calcium

Explanation:

Clacium has atomic number 20. The atomic number. This means that it has 20 protons and 20 electrons. it has 21 neutrons.

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