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29 January, 00:08

The elements silicon (atomic number 14) and chlorine (atomic number 17) are both in Period 3. Which is the more reactive element?

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Answers (2)
  1. 29 January, 00:16
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    Chlorine is more reactive than silicon. Chlorine has 7 valence electrons; nearly a full outer shell, while silicon has only 4 valence electrons
  2. 29 January, 00:33
    0
    Answer;

    -Chlorine is more reactive than silicon

    Explanation;

    -As you move across a period, the nuclear charge will increase; the number of energy levels will stay the same, so there is a stronger and stronger attraction for the electrons.

    -The electrons are being held more tightly as you move across a period. It becomes more and more difficult to lose electrons and consequently the reactivity of non metals increases as you go from left to right across the periodic table; Therefore; chlorine is more reactive than silicon.
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