sandraaaT sandraaaT
  • 15-05-2017
  • Physics
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Which of these pairs of elements have the same number of valence electrons? ANSWER QUICK PLEASE


hydrogen (H) and helium (He)


sodium (Na) and potassium (K)


carbon (C) and oxygen (O)


boron (B) and beryllium (Be)

Respuesta :

circus123
circus123 circus123
  • 18-05-2017
the answer to that is b
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