CAPE Physics Unit 2 · 2019 · Paper 1 · Question Q34

The equation which represents the radioactive change of a ^{60}_{27}\text{Co} nucleus by \beta^- emission is

1. (A)^{60}_{27}\text{Co} \longrightarrow \ ^{0}_{-1}\beta + \ ^{60}_{27}\text{Ni}
2. (B)^{60}_{27}\text{Co} \longrightarrow \ ^{0}_{-1}\beta + \ ^{60}_{28}\text{Ni}
3. (C)^{60}_{27}\text{Co} \longrightarrow \ ^{0}_{0}\beta + \ ^{60}_{26}\text{Ni}
4. (D)^{60}_{27}\text{Co} \longrightarrow \ ^{0}_{-1}\beta + \ ^{60}_{28}\text{Ni}