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20 November, 12:53

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

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Answers (2)
  1. 20 November, 13:07
    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.
  2. 20 November, 13:15
    0
    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.
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