A nucleus $_z{X^A}$ emits an ${\rm{\alpha }}$-particle. The resultant nucleus emits a ${{\rm{\beta }}^ + }$ particle. The respective atomic and mass numbers of the final nucleus will be

NEET UG PHYSICS MCQ: NUCLEI

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A nucleus

_z{X^A}

emits an

\mathrm{\alpha }

-particle. The resultant nucleus emits a

{\mathrm{\beta }^ + }

particle. The respective atomic and mass numbers of the final nucleus will be

View answer and explanation

Correct option: A

Z - 3,A - 4

Option A (

Z - 3,A - 4

) is correct because alpha emission reduces the atomic number by 2 and the mass number by 4, while beta-plus emission reduces the atomic number by 1 and leaves the mass number unchanged.

More Questions from NUCLEI

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The ratio of the nuclear radii of elements with mass numbers

\mathrm{216}

and

\mathrm{125}

is In a hypothetical fission reaction

{ }_{92} X^{236} \rightarrow{ }_{56} Y^{141}+{ }_{36} Z^{92}+3 R

The identity of emitted particles

({R})

is: The radius of the nucleus of the atom with A=216 is (take

{R_0}\; = \mathrm{ }1.3fm

) The correct sequence of the increasing wavelength of the given radiation sources is Which of the following nuclear fragments corresponding to nuclear fission between neutron

\left({ }_0^1 \mathrm{n}\right)

and uranium isotope

\left({ }_{92}^{235} \mathrm{U}\right)

is correct: Which of the following has the mass closest in value to that of the positron

1\,\,a.m.u = 931\,\,MeV