A radioactive decay can form an isotope of the original nucleus with the emission of particles
A
one ![]()
and two ![]()
B
four ![]()
and one ![]()
C
one 
and four 
and four
D
one 
and one 
and one
Text Solution
Verified by ExpertsThe correct answer is:
A
Emission of 
particle decreases the atomic number and the mass number by 2 and 4 respectively. Emission of 
-particle increases the atomic number by 1 while the mass number remains unchanged. Therefore, after the emission of one 
and two 
-particles, the atomic number remains the same while the mass number decreases by 4 . Hence, the emitted nucleus is the isotope of the original nucleus.
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