2. Which is more dangerous, a nuclie with a short half-life or a nuclide with a large half-life?
Short half-life Large half-life I am Superman! Both have no effect upon me! Half-life? None of these
3. Fill in the blank: 22/11 Na--> (blank) +22/10 Ne
4/2 He 1/0 n 0/-1 e 0/1 e None of these
4. 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
5. If nuclide X has a change in its mass number, then it must have undergone:
Alpha particle emission Beta particle emission electron capture positron emission None of these
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