Unicorn54547
Unicorn54547 Unicorn54547
  • 30-10-2018
  • Chemistry
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Please help with #’s 12 ,20,21

Please help with s 12 2021 class=

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cashward123
cashward123 cashward123
  • 30-10-2018
the atomic number
12= Magnesium (Mg)
20= Calcium (Ca)
21= Scandium (Sc)
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