Chapter 13

Question 1

What are the effects of alpha decay?

Answer 1

reduces mass number to compensate for large nuclei

Question 2

What are the effects of beta decay?

Answer 2

Changes neutrons to protons; compensates for too many neutrons (or N/Z ratio is too high)

Question 3

What are the effects of position emission (beta +)

Answer 3

Changes proton to neutrons to compensate for too many protons (N/Z ratio is too low)

Question 4

What are the effects of electron capture?

Answer 4

Changes protons to neutrons to compensate for too many protons (N/Z ratio is too low)

Question 5

What are the effects of gamma decay?

Answer 5

No N/Z change; unpredictable

Question 6

All radioactive decay reactions are

a) first order
b) second order
C) zero order

Describe the relationship between half life and concentration

Answer 6

A. If it is first order, this means that the half life is dependent on its concentration

Question 7

Half life equation

Answer 7

t (1/2) = 0.693/k

Question 8

Nucelar Binding Energy

Answer 8

Protons and neutrons weigh less when bound together

Question 9

Which of the following radioactive processes results in an increase in atomic number?

I. alpha decay
II. positron emission
III. beta decay

  A. I and II only
  B. I only
  C. III only
  D. II and III only
  E. I, II, and III

Answer 9

C

Question 10

When 137Ba is bombarded with a neutron particle, a certain particle is emitted and 137Cs is formed. What is the emitted particle?

  A. alpha particle
  B. beta particle
  C. proton
  D. neutron
  E. positron

Answer 10

C