Assertion : Radioactive nuclei emit ${\beta ^ - }$ particles.

Reason : Electrons exist inside the nucleus

  • [AIIMS 2003]
  • A

    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

  • B

    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

  • C

    If the Assertion is correct but Reason is incorrect.

  • D

    If both the Assertion and Reason are incorrect.

Similar Questions

The mass of a nucleus ${ }_Z^A X$ is less that the sum of the masses of $(A-Z)$ number of neutrons and $Z$ number of protons in the nucleus. The energy equivalent to the corresponding mass difference is known as the binding energy of the nucleus. A heavy nucleus of mass $M$ can break into two light nuclei of masses $m_1$ and $m_2$ only if $\left(m_1+m_2\right)M^{\prime}$. The masses of some neutral atoms are given in the table below:

${ }_1^1 H$  $1.007825 u$ ${ }_2^1 H$ $2.014102 u$ ${ }_3^1 H$ $3.016050 u$ ${ }_2^4 He$ $4.002603 u$
${ }_3^6 Li$ $6.015123 u$ ${ }_7^3 Li$ $7.016004 u$ ${ }_70^30 Zn$ $69.925325 u$ ${ }_{34}^{82} Se$ $81.916709 u$
${ }_{64}^{152} Gd$ $151.919803 u$ ${ }_{206}^{82} Gd$ $205.974455 u$ ${ }_{209}^{83} Bi$ $208.980388 u$ ${ }_{84}^{210} Po$ $209.982876 u$

$1.$ The correct statement is:

$(A)$ The nucleus ${ }_3^6 Li$ can emit an alpha particle

$(B)$ The nucleus ${ }_{84}^{210} P_0$ can emit a proton

$(C)$ Deuteron and alpha particle can undergo complete fusion.

$(D)$ The nuclei ${ }_{30}^{70} Zn$ and ${ }_{34}^{82} Se$ can undergo complete fusion.

$2.$ The kinetic energy (in $keV$ ) of the alpha particle, when the nucleus ${ }_{84}^{210} P _0$ at rest undergoes alpha decay, is:

$(A)$ $5319$ $(B)$ $5422$ $(C)$ $5707$ $(D)$ $5818$

Give the answer question $1$ and $2.$

  • [IIT 2013]

A nucleus of an element ${}_{84}{X^{202}}$ emits an $\alpha $-particle first, $\beta $ -particle next and then a gamma photon. The final nucleus formed has an atomic number

Beta rays emitted by a radioactive material are

Consider the following two statements

$A.$ Energy spectrum of $\alpha-$ particles emitted in radioactive decay is discrete

$B.$ Energy spectrum of $ \beta -$ particles emitted in radioactive decay is continuous

In nuclear reaction $_2H{e^4}{ + _z}{X^A}{ \to _{z + 2}}{Y^{A + 3}} + A,\;A$ denotes