Which of following statements are true regarding radioactivity (I) All radioactive elements decay ex

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13.Nuclei

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Which of the following statements are true regarding radioactivity

$(I)$ All radioactive elements decay exponentially with time

$(II)$ Half life time of a radioactive element is time required for one half of the radioactive atoms to disintegrate

$(III)$ Age of earth can be determined with the help of radioactive dating

$(IV)$ Half life time of a radioactive element is $50\%$ of its average life periodSelect correct answer using the codes given belowCodes :

A

$I \, and\,II$

B

$I, III \, and\,IV$

C

$I, II \, and\,III$

D

$II \, and\,III$

Solution

(c)

Standard 12

Physics

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