- Write the symbol/formula and the oxidation number/ion charge in the box with each substance across the top and down the side.
- Use these to write the correct formula for each compound in the appropriate box.
- Substances down the side will be the positive (first) half of the formula.
- Substances across the top will be the negative (second) half of the formula.
negative   positive
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Achloride
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Bsulfide
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Chydroxide
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Dnitrate
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Esulfate
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Fchlorate
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Gacetate
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Hcarbonate
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1 sodium
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2 potassium
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3 silver
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4 magnesium
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5 calcium
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6 aluminum
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7 ammonium
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8 lead (II)
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9 mercury (II)
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10 iron (III)
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11 phosphorus (IV)
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