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QUESTION

# What are some examples of ionic compounds?

Lets take the ionic formula for Calcium Chloride, CaCl_2.

Calcium is an Alkaline Earth Metal in the second column of . This means that calcium has 2 it readily gives away in order to seek the stability of the octet. This makes calcium a Ca^(+2) cation.

Chlorine is a Halogen in the 17th column or p^5 group. Chlorine has 7 . It needs one electron to make it stable at 8 electrons in its valence shells. This makes chlorine a Cl^(−1 ) anion.

Ionic bonds form when the charges between the metal cation and non-metal anion are equal and opposite. This means that two Cl^(−1) anions will balance with one Ca^(+2) cation.

This makes the formula for calcium chloride CaCl_2.

For the example Aluminum Oxide Al_2O_3

Aluminum has an oxidation state of +3 or Al^(+3) Oxygen has an oxidation state of -2 or O^(-2)

The common multiple of 2 and 3 is 6.

We will need 2 aluminum atoms to get a +6 charge and 3 oxygen atoms to get a -6 charge. When the charges are equal and opposite the atoms will bond as Al_2O_3.

I hope this is helpful. SMARTERTEACHER