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14 September, 11:47

Which of the listed properties are the same for the elements carbon (C), nitrogen (N), and oxygen (O) ?

Hint: Look at your periodic table.

number of protons

number of energy levels

number of neutrons

number of valence electrons

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Answers (1)
  1. 14 September, 14:12
    0
    It's not the protons neutrons or electrons I know for sure but not the energy levels but it's the only one left so it has to be
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