Q. In a given sample there are 10,000 radio-active atoms of half- life period 1 month. The number of atoms remaining without disintegration at the end of 3months is :
Solution:
The time interval taken by a radioactive substance to disintegrate to half of its initial value is called half life.
In 1 month it will be 5000
In 2 months it will be 2500
In 3 months it will be 1250
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