Which of the following statement is not true for radioactive decay?
(1) Amount of radioactive substance remained after three half lives is \(\frac{1}{8}th\) of original amount.
(2) Decay constant does not depend upon temperature.
(3) Decay constant increases with increase in temperature.
(4) Half life is In 2 times of \(\frac{1}{\text{rate constant}}\) .
