Section 25.3
Transmutation
Practice Test
1.
The half-life for tritium is 12.32 years. How long will it take for a 10.00-g sample of tritium to decay until 1.875 g remain?
Data Table 1
Parent and daughter nuclei data
Number of half-lives
Parent fraction
Daughter fraction
Daughter-to-parent ratio
0
1
1
1/2
2
1/4
3
1/8
4
1/16
a.
0.6594 years
b.
5.333 years
c.
24.64 years
d.
30.80 years
Hint
2.
The conversion of an atom of one element into an atom of a different element is _______________.
a.
isotopic abundance
b.
radioactivity
c.
transuranium element
d.
transmutation
Hint
3.
The elements with atomic numbers greater than 92 are _______________.
a.
transuranium elements
b.
lanthanides
c.
actinides
d.
halogens
Hint
4.
The goal of ancient alchemy was to change lead (atomic number 82) into gold (atomic number 79). Which of the following could result in the transformation of lead into gold?
a.
an induced transmutation that removes an alpha particle and a positron from a lead atom
b.
an induced transmutation that adds an alpha particle and removes a positron from a lead atom
c.
an induced transmutation that removes an alpha particle and a beta particle from a lead atom
d.
an induced transmutation that adds an alpha particle and removes a beta particle from a lead atom
Hint
5.
The time required for one-half of a radioactive isotope to decay into its products is _______________.
a.
half-time
b.
half-life
c.
transmutation
d.
isomerization
Hint
6.
Carbon-14 is used to date archaeological artifacts. If carbon-14 decays by loss of a beta particle, what new element is formed?
a.
nitrogen-13
b.
nitrogen-14
c.
carbon-13
d.
boron-14
Hint
