rennat557 rennat557
  • 26-09-2018
  • Chemistry
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Which of these pairs of elements have the same number of valence electrons? A. phosphorus (P) and chlorine (Cl) B. berylium (Be) and calcium (Ca) C. chlorine (Cl) and helium (He) D. oxygen (O) and carbon (C)

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esraax
esraax esraax
  • 26-09-2018
D. oxygen(O) and carbon(C)
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