carissaeastham04 carissaeastham04
  • 02-04-2020
  • Mathematics
contestada

A neutral atom of helium has 2 protons and blank electrons

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jameskibbe
jameskibbe jameskibbe
  • 02-04-2020
Valance. the electrons on the outermost ring
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31+34=90-n 45+1=70-k 6×9=41+m