A nucleus of element Y Y\,Y is represented as 2963Y{}^{63}_{29}\text{Y}2963Y.
Which representation is an isotope of element YYY?
6329Y{}^{29}_{63}\text{Y}6329Y
3163Y{}^{63}_{31}\text{Y}3163Y
2965Y{}^{65}_{29}\text{Y}2965Y
3165Y{}^{65}_{31}\text{Y}3165Y
170 exam-style questions on CIE IGCSE Physics 5.1.2a Composition of the nucleus and isotopes. Each one has a worked solution and a mark scheme showing where the marks go.