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A single atom of an element has 21 neurons 20 electrons and 20 protons which element is it?
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A single atom of an element has 21 neurons 20 electrons and 20 protons which element is it?

User Redestructa
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The element with atomic number 20 is calcium .

User Markus Malkusch
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Answer:

Calcium

Step-by-step explanation:

User Snj
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