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28 January, 11:18

Aluminum oxide can be produced during rocket launches. Show that the sum of positive and negative charges in a unit of Al2O3 equals zero.

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  1. 28 January, 11:37
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    The sum of positive and negative charges in a unit of Al2O3 equals zero.

    Aluminium has a charge of + 3 while Oxygen has a charge of - 2 on each ion.

    Al203 has 2 Al atoms and 3 O atoms.

    Charge on Al2O3 = 2 (charge on Al ion) + 3 (charge on O ion)

    = 2 (3) + 3 (-2)

    = 6 - 6

    = 0

    Explanation:

    Aluminium has 3 electrons in the outermost shell and has the tendency to lose those 3 electrons to form a positive ion and have a complete outermost shell.

    Whereas, Oxygen has 6 electrons in the outermost and has the tendency to accept two more electrons to form a negative ion and have a complete outermost shell.
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