Section 25.3
Transmutation
Practice Test
1.
The time required for one-half of a radioactive isotope to decay into its products is _______________.
SC.A.2.4.3
a.
transmutation
b.
isomerization
c.
half-time
d.
half-life
Hint
2.
The elements with atomic numbers greater than 92 are _______________.
a.
actinides
b.
halogens
c.
transuranium elements
d.
lanthanides
Hint
3.
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?
SC.A.2.4.3
a.
an induced transmutation that adds an alpha particle and removes a positron from a lead atom
b.
an induced transmutation that adds an alpha particle and removes a beta particle from a lead atom
c.
an induced transmutation that removes an alpha particle and a positron from a lead atom
d.
an induced transmutation that removes an alpha particle and a beta particle from a lead atom
Hint
4.
Carbon-14 is used to date archaeological artifacts. If carbon-14 decays by loss of a beta particle, what new element is formed?
SC.A.1.4.1
a.
carbon-13
b.
nitrogen-13
c.
boron-14
d.
nitrogen-14
Hint
5.
The conversion of an atom of one element into an atom of a different element is _______________.
a.
radioactivity
b.
transuranium element
c.
isotopic abundance
d.
transmutation
Hint
6.
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
SC.A.2.4.3
a.
0.6594 years
b.
5.333 years
c.
30.80 years
d.
24.64 years
Hint
