[" A radioactive sample has half-life of "5],[" years.Probability of decay in "10" years "],[" will be "]

A radioactive sample has a half-life of 4 years. Calculate the time in which the activity will be reduced to 25%.

A radioactive sample has half life of 1500 years. A sealed tube containing 1 g of sample will be containing …… of the sample after 3000 years. The missing figure is

A radioactive sample has half life of 1500 years. A sealed tube containing 1 g of a sample will contain ... g of the sample after 3000 years. The missing figure is :

A radioactive sample has a half-life of 20 years. The time at which the activity of the sample will reduce to 10% of its initial value is

A radioactive sample has a half- life of 1500 years. A sealed tube contains 1 g of the sample. How much quantity of sample will be left after 3000 years?

A radioactive sample has a half life 1500 years. A sealed tube conataining 1g of the sample will contain after 3000 years,