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: 1/0 n + 235/92 U --> 92/36 Kr + (blank) + 3 (1/0 n)
147/56 Ba 144/56 Ba 141/56 Ba 0/1 e None of these
4. During radioactive decay, what do nuclides always emit?
Gamma rays positrons alpha particles beta particles None of these
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
| about us | contact us
tutorials index | organic
chemistry | practice tests | online
quizzes | reference tools
site copyright (c) 2002 to neopages.com