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6. What is the charge of an Ammonium Ion (NH4)?
1-
1+
2-
2+
7. What is the charge of an Hydroxide Ion (OH)?
2+
2-
1-
1+
8. What is the charge of a Phosphate Ion (PO4)?
1-
1+
3-
2+
9. What is the charge of a Sulfite Ion (SO3)?
2-
1+
1-
2+
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