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1 mg radium has 2.68 xx 10^(18) atoms. I...

1 mg radium has `2.68 xx 10^(18)` atoms. Its half-life is 1620 years. How many radium atoms will disintegrate from 1 mg of pure radium in 3240 years ?

A

`2.01xx10^(9)`

B

`2.01xx10^(8)`

C

`1.01xx10^(9)`

D

`1.01xx10^(8)`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • 1 mg redium has 2.68xx10^18 atoms. Its half life is 1620 years. How many radium atoms will disintegrate from 1 mg of pure radium in 3240 years ?

    A
    `2.01xx10^9`
    B
    `2.01xx10^18`
    C
    `1.01xx10^9`
    D
    `1.01xx10^18`

  • The half-life of radium is 1500 years . In how many years will 1 g of pure radium be reduced to one centigram?

    A
    `3.927 xx 10^(2)years`
    B
    `9.927 xx 10^(2)years`
    C
    `99.927 xx 10^(2)years`
    D
    `0.927 xx 10^(2)years`

  • The half-life of radium is 1600 y. How much of 1 mu g of radium will remain undistintegrated after 8000 y?

    A
    `(1)/(28) mu g`
    B
    `(1)/(16) mu g`
    C
    `(1)/(32) mu g`
    D
    `(1)/(64) mu g`

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