Physics · 2019
JEE Main · 12 January 2019, Shift 2 · Q26
In a radioactive decay chain, the initial nucleus is _90^232 Th. At the end there are 6 α -particles and 4 β -particles which are emitted. If the end…
In a radioactive decay chain, the initial nucleus is $\displaystyle { }_{90}^{232} \mathrm{Th}$. At the end there are $\displaystyle 6$ $\displaystyle \alpha$-particles and $\displaystyle 4 \beta$-particles which are emitted. If the end nucleus is $\displaystyle { }_Z^A X, A$ and Z are given by :
Official answer
(2)
$\displaystyle \mathrm{A}=208 ; \mathrm{Z}=82$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.