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    trickster619's Avatar
    trickster619 Posts: 1, Reputation: 1
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    #1

    Mar 31, 2012, 07:08 AM
    I can't remember the form of the valencies in chemistry ( or -)anyone know how?
    Can anyone tell me of a clever way to remember if the valency is positive or negative?
    DrBob1's Avatar
    DrBob1 Posts: 425, Reputation: 86
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    #2

    Apr 2, 2012, 08:55 AM
    You have to learn how to use the Periodic Table. It's your friend for this and many other tasks in Chemistry.
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