Gallium is a metal with a remarkably low melting point of 30 ∘C30\text{ }^{\circ}\text{C}30 ∘C.
Describe how the arrangement and movement of the gallium atoms change when a sample is heated from 15 ∘C15\text{ }^{\circ}\text{C}15 ∘C to 45 ∘C45\text{ }^{\circ}\text{C}45 ∘C.
84 exam-style questions on Edexcel GCSE Chemistry 3.1 States of matter, covering 3.1.1 The three states of matter and changes of state. Each one has a worked solution and a mark scheme showing where the marks go.