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    [Complete the ionic half equation]: Cl₂ + 2e⁻ →

    thats an example, i only understand that it means the loss and gain of electrons but i dont know how to solve that or what that question specifically mean in terms of how many electrons are lost or gained?
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    How many e- does a Cl atom have in its outer shell?

    How many does it "want" to have?

    How many must it gain or lose to get that many?
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    (Original post by Pigster)
    How many e- does a Cl atom have in its outer shell?

    How many does it "want" to have?

    How many must it gain or lose to get that many?

    like there is an e- can there ever be an e+ ?
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    (Original post by ra1500)
    like there is an e- can there ever be an e+ ?
    e+ does exist, but only ever in physics, never chemistry.
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    (Original post by Pigster)
    How many e- does a Cl atom have in its outer shell?

    How many does it "want" to have?

    How many must it gain or lose to get that many?
    how do i know how many electrons it has in its outer shell
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    (Original post by ra1500)
    how do i know how many electrons it has in its outer shell
    Look at the periodic table. It's not organised at random.
 
 
 
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