(C) The Curie $(Ci)$ is a non-$SI$ unit of radioactivity. It was originally defined as the amount of radioactivity produced by $1 \ g$ of radium-$226$

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(C) The Curie $(Ci)$ is a non-$SI$ unit of radioactivity. It was originally defined as the amount of radioactivity produced by $1 \ g$ of radium-$226$. By definition,$1 \ Ci = 3.7 \times 10^{10}$ disintegrations per second. Since it measures the rate of radioactive decay,it is a unit of radioactivity or activity. Therefore,the correct option is $(C)$.

Class 12 Physics Nuclei Properties of Alpha, Beta and Gamma Rays and Decay Process

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Curie is a unit of

A
Length
B
It is not any unit
C
Activity
D
Atomic number

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Class 12

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Chapter

Nuclei

Subtopic

Properties of Alpha, Beta and Gamma Rays and Decay Process

Which of the following cannot be emitted by radioactive substances during their decay?

EasyAIEEE 2003

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Which spectrum is continuous?

Easy

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The nucleus $_{48}^{115}Cd$ after two successive ${\beta ^ - }$ decays will give:

EasyAIPMT 1988

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When $_{90}Th^{238}$ transforms into $_{83}Bi^{222}$,the number of $\alpha$ and $\beta$ particles emitted are:

Medium

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An element $X$ decays into element $Z$ by a two-step process:
$X \rightarrow Y + 4e$
$Y \rightarrow Z + 2e^{-}$
Then:

MediumKCET 2016

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Curie is a unit of

Similar Questions

Which of the following cannot be emitted by radioactive substances during their decay?

Which spectrum is continuous?

The nucleus $_{48}^{115}Cd$ after two successive ${\beta ^ - }$ decays will give:

When $_{90}Th^{238}$ transforms into $_{83}Bi^{222}$,the number of $\alpha$ and $\beta$ particles emitted are:

An element $X$ decays into element $Z$ by a two-step process:$X \rightarrow Y + 4e$$Y \rightarrow Z + 2e^{-}$Then:

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An element $X$ decays into element $Z$ by a two-step process:
$X \rightarrow Y + 4e$
$Y \rightarrow Z + 2e^{-}$
Then: