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
D. 2 and 3
Answer: Option C
This Question Belongs to Physics GK Chapter Wise >> Modern Physics
Related Questions on Modern Physics
. . . . . . . . invented Atom Bomb.
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B. John Bau a Ning
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D. Samuel Colt
A. when low speed electrons is ejected
B. when high speed electron is obstructed by a metal surface
C. when anode-ray obstructed by a solid object
D. when γ-ray is obstructed by a solid object
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