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Chemistry, 18.11.2020 17:30 nicolesan3

Which of these elements have the same number of valence electrons? aH, Ne, Ar, Kr bNa, Al, Si, S cBe, Mg, Ca, Sr dB, Si, As, Te

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Which of these elements have the same number of valence electrons? aH, Ne, Ar, Kr bNa, Al, Si, S cBe...

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