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A sample of radioactive element has a ma...

A sample of radioactive element has a mass of `10 g` at an instant `t=0`. The approximate mass of this element in the sample after two mean lives is

A

2.50 gm

B

1.35 gm

C

6.30 gm

D

3.70 gm

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The correct Answer is:
B
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AAKASH INSTITUTE-NUCLEI-Assignment Section A Objective (One option is correct )
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  2. Alpha rays emitted from a radioactive substance are

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  5. If T is the half-life of a radioactive material, then the fraction tha...

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  6. The half-life of a radioactive element which has only (1)/(32) of its ...

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  9. Half-life of radioactive element depend upon

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  10. The half-life period of a radioactive substance is 5 min. The amount o...

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  11. Half-lives of two radioactive substances A and B are respectively 20 m...

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  12. Half-life of a radioacitve element is 10 days. The time during which q...

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  13. An element A decays into element C by a two-step process : A rarr B ...

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  14. During mean life of a radioactive element, the fraction that disintegr...

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  18. A sample of radioactive element has a mass of 10 g at an instant t=0. ...

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