In the uranium radioactive series, the initial nucleus is \( { }_{9...

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In the uranium radioactive series, the initial nucleus is \( { }_{92} \mathrm{U}^{238} \) and the final nucleus is \( { }_{82} \mathrm{~Pb}^{206} \). When the uranium nucleus decays to lead, the number of \( \alpha \)-particle emitted
\( \mathrm{P} \) will be
(A) 1
(B) 2
(C) 4
(D) 8
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