Gadolinium-`153`, which is used to detect osteoporoiss, has a life of `242` days. After how many days, on an average, a nuclide can be conisdered absent form patient's system?

Gadolinium-153 is used in the detection of osteoporosis disease of bones. Half-life of gadolinium-153 is 500 days. After how many days, on an average, the nuclide can be considered absent from the body of patients ?

Gadolinum-153, which is used to detch osteoprosis, half a half-life of 242days. Which value is closet to the percentage of the Gd-153 left in a patient's system after 2 years (730days)?

The half-life of radon is 3.8 days. After how many days 19/20 of the sample will decay ?

The half-life of radon is 3.8 days. After how many days 19/20 of the sample will decay ?

Radon has 3.8 days as its half-life . After how many days 25% of a radon sample remains undecayed ?

The half life of radon is 3.8 days. After how many days will only one twentieth of radon sample be left over?

The half life of radon is 3.8 days . After how many days will only one twentieth of radon sample be left over ?

Half life oa radioactive material is 6.93 days. After how many days (19/20) part of the sample will decay?