Concept Check Questions

P. 35
1. Copper is more dense than zinc.

2. There is more zinc than copper in a penny.

3. There is more because it completely fills the inside of the penny, as the copper is only on the outside.

P. 38
1. a. Phosphorus b. Nickel c. Copper d. Cobalt e. Bromine f. Potassium g. Sodium h. Iron

2.  Phosphorus, Nickel, Copper, Cobalt, Bromine

3. The answer is the element's symbol because it is a more abbreviated version so it is more likely to be used.

4. a. Hydrogen and oxygen, 2 atoms b. Calcium and Chloride, 2 atoms c. Sodium, hydrogen, cobalt, three atoms d. Hydrogen, Sulfer, Oxygen, 3 atoms.

5. H2+ O2-->H2O

Thank You!
Forever and Always,
Abi