Q75
Which of the following statements are true? 1. All radioactive elements decay exponentially with time. 2. Half-life time of radioactive elements is the time required for one-half of the radioactive atoms to disintegrate. 3. Age of the earth can be determined by radioactive dating. 4. Half-life time of a radioactive element is fifty percent of its average life period. Select the correct answer:
A.
1 and 3
B.
1, 3 and 4
C.
1, 2 and 3
AnswerD.
2 and 3
Answer: Option C
Solution
Answer: Option C
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