Half-life of a radioacitve element is `10` days. The time during which quantity remains `1//10` of initial mass will be

The half-life of a radioactive substance is 10 days. This means that

The half life of radioactive radon is 3.8 days. Find the time during which 1/20 remain undecayed.

The half life period of an radioactive element is 1.4 xx 10 ^(10) years. The time in which the activity of the element is raduced to 90% of its original value is :

Half life of a radioactive element is 10 days. What percentage of the element will remain undecayed after 100 days?

The half life of a radioactive substance is 4.2 days. Find the time during which 1/8" of the sample will remain undecayed.

The half-life period of a redioactive element is 20 days. What will be the remaining mass of 100 g of it after 60 days ?