Chapter 13
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What are the effects of alpha decay?
reduces mass number to compensate for large nuclei
What are the effects of beta decay?
Changes neutrons to protons; compensates for too many neutrons (or N/Z ratio is too high)
What are the effects of position emission (beta +)
Changes proton to neutrons to compensate for too many protons (N/Z ratio is too low)
What are the effects of electron capture?
Changes protons to neutrons to compensate for too many protons (N/Z ratio is too low)
What are the effects of gamma decay?
No N/Z change; unpredictable
All radioactive decay reactions are a) first order b) second order C) zero order Describe the relationship between half life and concentration
A. If it is first order, this means that the half life is dependent on its concentration
Half life equation
t (1/2) = 0.693/k
Nucelar Binding Energy
Protons and neutrons weigh less when bound together
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
C
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
C