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Unit of decay constant of radiocative di...

Unit of decay constant of radiocative disintegration is

A

`time`

B

`min^(-2)`

C

`time^(-1)`

D

`time` `mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
For a radioactive disintegration,
`k=(2.303)/(t)log ""(N_(0))/(N)`
where, k is know as decay constant or disintegration constant.
The unit for decay constant is `"time"^(-1).`
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Knowledge Check

  • The decay constant of a radioactive sample

    A
    decreases as the atom becomes older
    B
    increases as the atom becomes older
    C
    is independent of the age
    D
    dependes on the nature of activity

  • Calculate the rate constant for the radioactive disintegration of an isotope that has a halflife of 6930 yr.

    A
    `1. 00 xx 10 ^(-5) yr ^(-1)`
    B
    `1. 00 xx 10 ^(-4) yr ^(-1)`
    C
    `1,00 xx 10 ^(-3) yr ^(-1)`
    D
    `1. 00 xx 10 ^(-3) yr ^(-1)`

  • A radioactive element undergoes two different types of radioactive disintegration, one with disintegration constant lambda_(1) and the other with lambda_(2) . The half-life of the element is

    A
    `(0.693)/(lambda_(1)+lambda_(2))`
    B
    `(0.693)/((lambda_(1)+lambda_(2))//2)`
    C
    `(0.693).(lambda_(1)lambda_(2))/(lambda_(1)+lambda_(2))`
    D
    `(0.693lambda_(1)lambda_(2))/(2(lambda_(1)+lambda_(2)))`

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