a single atom of an element had 21 neutrons, and 20 electrons, and 20 protons which element is it ? K. Zr. Ca. Sc

asked Jul 8, 2019 15.6k views

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4 votes

The element is Calcium... Ca. A single atom of an element had 21 neutrons, and 20 electrons, and 20 protons is Calcium.

Rob Reagan answered Jul 9, 2019

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4 votes

You element is calcium.

Matt Razza answered Jul 13, 2019

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