CAPE Physics Unit 2 · 2016 · Paper 1 · Question Q37

An isotope of radium is represented by ^{224}_{88}\text{Ra}. Which row in the table correctly describes a neutral atom of this isotope?

1. (A)Number of Protons: 88, Number of Neutrons: 88
2. (B)Number of Protons: 88, Number of Neutrons: 136
3. (C)Number of Protons: 136, Number of Neutrons: 88
4. (D)Number of Protons: 224, Number of Neutrons: 88

This question uses a figure or table from the paper — you'll see it when you practise.