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Sub-Atomic Particles

A radioactive...

Question

A radioactive substance has a constant activity of 2000 disintegrations/minute. The material is separated into two factions, one of which has an initial activity of 1000 disintegrations per second while the other fraction decays with $t_{1 / 2} = 24$ hours. The total activity in both samples after 48 hours of separation is :

A

1500

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B

1000

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C

1250

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D

2000

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Solution

The correct option is D 2000
The given problem refers that the rate is constant.
Thus, the total activity in both samples after 48 hours of separation will be equal to 2000.
Hence, option D is correct.

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