After how many days will `1/20 th` of the radio active element remain behind, if half life of the element is 6.931days

After how many days will 1/20th of the radioactive element remain, if the half life of the element is 6.931 days?

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

What is the relation between decay constant and half life of a radio active element?

A saample of radioactive elements contains 4xx10^(16) active nuclei. If half-life of element is 10 days, then the number of decayed nuclei after 30 days is

A saample of radioactive elements contains 4xx10^(16) active nuclei. If half-life of element is 10 days, then the number of decayed nuclei after 30 days is

A saample of radioactive elements contains 4xx10^(10) active nuclei. If half-life of element is 10 days, then the number of decayed nuclei after 30 days is

After an interval on one day 1//6th of the initial amount of a radioactive material remains in a sample. Then its half life is

After an interval of one day , 1//16th initial amount of a radioactive material remains in a sample. Then, its half-life is .

After an interval of one day , 1//16th initial amount of a radioactive material remains in a sample. Then, its half-life is .

The half-life period of a radioactive element is 140 day. After 560 days, 1 g of the element will reduce to