1. If I could add a proton to a carbon nucleus, I would get:

a. a carbon isotope

b. a carbon ion

c. a nitrogen nucleus

d. a carbon molecule

2. What should I add to (or remove from) an oxygen atom to make an oxygen ion?

a. electron

b. neutron

c. proton

d. another oxygen atom

3. If you had to guess how many neutrons ²⁰⁷Pb (=lead) had, what would you choose?

a. More than 103

b. Less than 103

c. 207

d. 82

4. What is "chemical reaction"? What is a "nuclear reaction"?

5. Which is the largest distance?

a. One light year

b. Distance Sun to its nearest stellar neighbor.

c. Sun to Pluto

d. Distance Earth to nearest star