Question 1
An isotope which has too high a neutron-proton ratio can gain stability by:
◦ beta emission
◦ K-capture
◦ proton emission
◦ gamma emission
◦ alpha emission
Question 2
Approximately what mass of a 1.00 mg sample of
131I remains after 40.2 days? The half-life of
131I is 8.04 d.
◦ 0.0313 mg
◦ 0.200 mg
◦ 0.0249 mg
◦ 0.0156 mg