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14 April, 08:02

Which elements forms an ion with a 1 - charge?

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  1. 14 April, 08:16
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    F - Cl - Br - I - At - Ts

    Explanation:

    All the halogens, are the elements that forms a ion with a - 1 charge.

    The elements from group 17 in the Periodic Table are the one that has 7 electrons of valence. They need only 1 e⁻ to have the closest noble gas conformation so, they can comply with the octet rule.

    This is an example:

    Cl₂ (g) + 2e⁻ → 2Cl⁻

    Chlorine which is a diatomic gas, gains 2 electrons to make 2 moles of chloride (in order to the balance the reaction)
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