teamsadie565 teamsadie565

11-04-2019
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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SpazZ99 SpazZ99

11-04-2019

Calcium because the number of protons is the number of the element on the periodic table

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kennedysamuel kennedysamuel

28-01-2021

Answer:

Ca

Explanation:

The answer above me

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