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    spartacus897's Avatar
    spartacus897 Posts: 1, Reputation: 1
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    #1

    Jan 29, 2007, 08:24 PM
    An ion that has 18e- and a net charge of 2+
    An ion that has 18e- and a net charge of +2
    Question 9 answers
    has 16 protons.
    has 18 neutrons.
    is an anion.
    has the symbol Ar2+.
    has the same number of electrons as an argon atom.
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #2

    Jan 29, 2007, 11:19 PM
    A lot of this information doesn't make sense.

    If it has 18 electrons and 2+, then it must have 20 protons, which doesn't make it Ar2+, it makes it Ca2+.
    This also has 20 neutrons. But it does have the same number of electrons as an argon atom, and it is a cation because it has a positive charge.

    Something is very wrong here :D
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