1g of a radioactive substance disintegrates at the rate of `3.7xx10^(10)` disintegrations per second. The atomic massof the substance is 226. Calculate its mean life.

One gram ofo a radioactive substance disintegrates at the rate of 3.7 xx10^(10) disintegarations per second. The atomic mass of the subsatnce is 226 . Calculate its mean life.

1g of a radio active substance disintegrates at the rate of 3.7× 10^10 disintegrations per second.The atomic mass of the substance is 226.Calculate its mean life.

When a radioactive substance is subjected to a vacuum, the rate of disintegration per second