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

User Jsstuball
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2 Answers

1 vote
calcium is the element. the number of protons is the atomic number therefore that would be your element
User Venkateswara
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6.7k points
1 vote
it is Calcium (Ca)

good luck
User Marcoslhc
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6.2k points
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