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chapter 7
section 1
ionic compounds
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Ionic
compounds

Compounds made up of
metals
and
nonmetals
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Ionic compounds


Atoms in the compound have a
charge
Charges must
balance
in the overall compound
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Steps to write chemical formula for ionic compounds
1. Find
elements
on periodic table
2. Determine
charges
of elements
3.
Balance
charges by adding more
atoms
4. Write
chemical formula
showing
number
of each atom
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Mistake 1
: Writing the number
1
after an element in the formula (e.g. LiO1 instead of Li2O)
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Mistake 2
: Leaving the charges on the elements when writing the
formula
(e.g. Li+2O2- instead of Li2O)
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