Given below are two statements:
Assertion (A): In beta-minus decay, an electron is emitted from the nucleus, even though electrons are not fundamental constituents of the nucleus.
Reason (R): During beta-minus decay, a neutron inside the nucleus transforms into a proton, an electron, and an antineutrino.

Question

Given below are two statements:

Assertion (A): In beta-minus decay, an electron is emitted from the nucleus, even though electrons are not fundamental constituents of the nucleus.

Reason (R): During beta-minus decay, a neutron inside the nucleus transforms into a proton, an electron, and an antineutrino.

TestHub · Accepted Answer

Assertion (A) is true; electrons are not pre-existing in the nucleus as fundamental particles.

Reason (R) correctly describes the process of beta-minus decay: a neutron ( $n$ ) transforms into a proton ( $p$ ), an electron ( $e^{-}$ ), and an antineutrino ( $\overset{ν}{ˉ}_{e}$ ). This transformation explains the emission of an electron from the nucleus, thus R correctly explains A.

Physics - Modern Physics Question with Solution | TestHub

Options:

Doubts & Discussion

JEE Main 2027 (Class 12)