Forming ionic compounds: Balance the Charges so that the sum is equal to zero.

1. Na and O
2. K and S
3. Br and Ca
4. Ba and N
5. Al and P
6. I and Al
7. F and Sr
8. Li and Cl

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy

Complete each row of the table below by filling in the missing prefix or missing exponent.