barriogloria30 barriogloria30
  • 23-09-2020
  • Biology
contestada

Atoms of elements that are in the same group have the same number of
O protons
O protons and neutrons
O principle energy level
O valence electrons

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aveodell aveodell
  • 23-09-2020
Atoms are grouped together by their number of valence electrons
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