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A radioactive substance has a half-life period of 40 days. Calculate the time taken for 3/4th of original atoms to disintegrate.
A radioactive element has half-life period of 30 days. How much of it will be left after 90 days?
A certain element has half life period of 30 days. Find its average life
A radioactive element has half life period of 30 days. How much of it will be left after 90 days?
Suppose a radioactive substance disintegrates completely in 10 days. Each day it disintegrates at a constant rate which is twice the rate of the previous day. The percentage of the material left to be disintegrated after passing of 9 days is :
Half-life period for radioactive element is
The half life of a radioactive substance is 30 days. What is the time taken to disintegrate to 3//4^(th) of its original mass ?
If 9.0 g of a radioactive isotope has a half life period of 10 hrs. The half life period of 3.0 g of the same substance is:
