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Physics
Physics
Problem
In a radioactive decay chain, the initial nucleus is
90
232
Th
{}_{90}^{232}\text{Th}
90
232
Th
. At the end there are 6
α
\alpha
α
-particles and 4
β
\beta
β
-particles which are emitted. If the end nucleus is
Z
A
X
{}_{Z}^{A}\text{X}
Z
A
X
, A and Z are given by : a.
A
=
208
;
Z
=
80
A=208; Z=80
A
=
208
;
Z
=
80
b.
A
=
202
;
Z
=
80
A=202; Z=80
A
=
202
;
Z
=
80
c.
A
=
208
;
Z
=
82
A=208; Z=82
A
=
208
;
Z
=
82
d.
A
=
200
;
Z
=
81
A=200; Z=81
A
=
200
;
Z
=
81
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