CAPE Physics Unit 2 · 2008 (Rest of Region) · Paper 1 · Question Q43

A radioactive nucleus is represented by ^{227}_{85}\text{X}. It emits an \alpha-particle and a \gamma ray to form a different nucleus of element Y. Which of the following represents the new nucleus?

1. (A)^{223}_{86}\text{Y}
2. (B)^{223}_{82}\text{Y}
3. (C)^{223}_{83}\text{Y}
4. (D)^{225}_{81}\text{Y}