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2 October, 17:29

Why is calcium oxide CaO, and not CaO2?

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Answers (2)
  1. 2 October, 18:27
    0
    The Calcium ion is an Alkaline earth metal and wants to give up the 2 s orbital elections and become a + 2 cation.

    Oxygen has six valence electrons and is looking to gain two electrons to complete the octet (8) electron count in the valence shell making it a - 2 anion.

    When the charges of the Calcium + 2 and the Oxygen - 2 are equal and opposite, the ions for an electrical attraction. (Remember Paula Abdul told us "Opposites Attract")

    This one to one ratio of charges makes the formula CaO
  2. 2 October, 20:01
    0
    Ca’s charge is 2 + and O’s charge is 2-. When you cross the charges it would be Ca2O2 and you would simplify to Ca1O1 and the ones are implied so just CaO
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