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9) Is there any other ratio of aluminum and oxygen ions that could exist?
For instance, could you have Alz0 or AlO2? Explain your answer.

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Answer:

The ratio of aluminium and oxygen ions that only exists is 2:3

Since Aluminium has 3 valence electrons and oxygen has 2 vacant orbitals

Aluminium holds a valence of 3 and oxygen 2, when they react a compound of formula

[tex]Al _{2} O _{3}[/tex]

is formed

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