Chemistry: Quiz: Radioactivity

Quiz: Radioactivity

1. The spontaneous disintegration of unstable nuclei by the emission of particles is called

a. radioactivity

b. spontaneous combustion

c. chemical decomposition

2. An alpha particle has

a. 2 protons and 1 neutron

b. 2 protons and 2 neutrons

c. 1 proton and 2 neutrons

3. Fast moving electrons emitted by atomic nuclei are known as

a. alpha particles

b. beta particles

c. gamma rays

4. When radioactive decay changes atoms of one chemical element into atoms of another element, the process is called

a. nuclear explosions

b. chemical decomposition

c. transmutation

5. An alpha particle is a

a. Be-4 nucleus

b. He-4 nucleus

c. C-12 nucleus

6. A thorium-232 atom undergoes alpha decay. What element will be the product of this process?

a. radium

b. uranium

c. plutonium

7. An atom of H-3 undergoes beta decay. The element that will be produced is

a. hydrogen

b. helium

c. lithium

8. The mass and charge of a gamma ray are

a. mass = 1 and charge = 0

b. mass = 0 and charge = 1

c. mass = 0 and charge = 0

9. Alpha emission occurs in elements with an atomic number

a. greater than 83

b. less than 83

c. exactly 83