Show that when a radioactive element emits 1 alpha and two beta particles the daughter nucleus is an isotope of the parent nucleus.
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Explanation:
In alpha decay, decreases 4 unit mass number and 2 unit atomic number.
In beta decay, increases one unit atomic number but mass will remain same.
So,
n
m
X→
α
n−2
m−4
Y→
2β
n−2+2
m−4
Z or
n
m−4
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