When ${ } _ { 92 } ^ { 238 } \mathrm { U }$ decays to ${ } _ { 90 } ^ { 234 } \mathrm { Th }$
,a(n)______________ is emitted.

Question

Quizplus · Accepted Answer

When ${ } _ { 92 } ^ { 238 } \mathrm { U }$ decays to ${ } _ { 90 } ^ { 234 } \mathrm { Th }$, an alpha particle is emitted. This is because during alpha decay, the nucleus emits an alpha particle which is a helium nucleus consisting of two protons and two neutrons.

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When ${ } _ { 92 } ^ { 238 } \mathrm { U }$