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Chynea Chynea
  • 17-04-2016
  • Chemistry
Answered

Which electron shell contains the valence electrons of a radium atom in the ground state ?

1 . the sixth shell 2. the second shell 3. the seventh shell 4. the eighteenth shell

Verified Answer :

Anonymous Anonymous
  • 17-04-2016

I think the answer is the seventh since the valence electron configuration is [Rn]7s^2.  

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