The Isotope ${ } _ { 92 } ^ { 235 } \mathrm { U }$

Multiple Choice

The isotope ${ } _ { 92 } ^ { 235 } \mathrm { U }$ is radioactive and decays in a series to ${ } _ { 90 } ^ { 227 }$ Th. In this series, the particles ejected from the nucleus are

A) four alpha particle and one beta-minus particle.
B) two alpha particles and two beta-minus particles.
C) one alpha particle and four beta-minus particles.
D) three alpha particles and one beta-minus particle.
E) one alpha particle and three beta-minus particles.