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15 September, 12:32

How many electrons do all halogen atoms need to fill their outer energy level?

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Answers (2)
  1. 15 September, 15:19
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    Halogens only need one electron to complete their valkance shells.

    Explanation:

    Halogens are present in the VIIA group of the periodic table so seven electrons are already present. one is needed to become stable.
  2. 15 September, 15:42
    0
    Seven

    Explanation:

    Because all halogens have seven valence electrons, they are "eager" to gain one more electron. Doing so gives them a full outer energy level, which is the most stable arrangement of electrons. Halogens often combine with alkali metals in group 1 of the periodic table.
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