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

asked Nov 9, 2019 122k views

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1 vote

calcium is the element. the number of protons is the atomic number therefore that would be your element

Venkateswara answered Nov 12, 2019

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1 vote

it is Calcium (Ca)

good luck

Marcoslhc answered Nov 13, 2019

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