Given the compound `~Al_2O_3` ,  a) What is the charge of each Al ion if each O ion has a charge of 2-? How do you know? b) What must happen to a neutral Al atom before it can bond with O?

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Ionic Bonding:

The bond formed between Al and O is called an ionic bond. Ionic bonds are formed when when an atom that is a metal (Al) transfers one or more valence electrons to an atom that is a nonmetal (O).

When a metal atom such as Al loses electrons, it becomes a positively charged ion. When a nonmetal atom such as O gains electrons, it becomes a negatively charged ion. When Al forms an ion, it loses three valence electrons, giving it a 3+ charge. When O forms an ion, it...

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