The beta-particles of a radioactive metal ori | vedclass

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(D) The correct option is $D$.$\beta^{-}$-particles are emitted during the process of radioactive decay,which originates from the nucleus of an atom.T

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the nucleus of the metal atoms

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(D) The correct option is $D$.$\beta^{-}$-particles are emitted during the process of radioactive decay,which originates from the nucleus of an atom.The fundamental nuclear reaction for $\beta^{-}$-decay is:${ }_{0}^{1} n \longrightarrow{ }_{1}^{1} p+{ }_{-1}^{0} e+\bar{
u}$In this process,a neutron inside the nucleus is converted into a proton,emitting a $\beta^{-}$-particle (an electron) and an antineutrino $(\bar{
u})$.This changes the atomic number of the nucleus,as represented by:${ }_{Z}^{A} X \longrightarrow{ }_{Z+1}^{A} Y+{ }_{-1}^{0} e+\bar{
u}$Since this process involves the transformation of nucleons (protons and neutrons),the $\beta$-particles originate from the nucleus of the metal atoms.

The $\beta$-particles of a radioactive metal originate from

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