2. If a nucleus is said to have a low probability of undergoing decomposition, it said to have:
high kinetic stability low beta emission rate low gamma ray emission rate high thermodynamic stability high gamma ray emission rate
3. Gamma rays have:
0 protons, 1 neutron, 1 electron 0 protons, 0 neutrons, 0 electrons 1 proton, 0 neutrons, 1 electron 1 proton, 1 neutron, 1 electron None of these
4. Which is NOT an example of an isotope?
14/6 C 232/90 Th 0/-1 e 235/92 U All of these are isotopes
5. You are given 1.54 grams of a substance. After6 days, 0.38 grams remain. What is the half-life of this substance?
71.3 hours 35.8 hours 29.4 hours 192 hours None of these
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