Scientists made theoretical calculations about atoms. These calculations agreed closely with measurements of the light given out by heated atoms.
Which feature did this evidence add to the nuclear model of the atom?
The positive charge of the nucleus is carried by protons.
Most of the volume of the atom is empty space.
The nucleus also contains particles with no charge.
Electrons orbit the nucleus in shells at fixed distances.
101 exam-style questions on OCR GCSE Chemistry 1.2 Atomic structure, covering 1.2.1 Development of the atomic model, 1.2.2 The nuclear model and the size of atoms, and 1.2.3 Subatomic particles in atoms and ions. Each one has a worked solution and a mark scheme showing where the marks go.