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Calcium Oxide - dot and Cross

Doji

Anyone want to shwo me on paint how to do this? im stuck :s-smilie:

Thanks

Reply 1

W0nker

Bit scruffy but you get the idea.

CaO bond.JPG10.5KB

Reply 2

Doji

oh cheers man +repd you :biggrin:

i thought oxide had a full 8 electrons around it as it was an ion, but ddint think Ca could have been an ion too.

Reply 3

W0nker

The-Godfather

oh cheers man +repd you :biggrin:

i thought oxide had a full 8 electrons around it as it was an ion, but ddint think Ca could have been an ion too.

Well yes the oxygen does have a full outer shell when it is bonded to calcium as calcium has given both of its outer electrons to oxygen, so the most outer shell is full. Calcium is therefore an ion because it has lost two. Just remember things bond to become stable so you can decide how many electrons each atom is going to gain / lose.