This question is about the particles in atoms.
The table shows information about the three particles in an atom.
| Particle | Relative charge | Relative mass |
|---|---|---|
| proton | ? | 1 |
| neutron | 0 | ? |
| electron | ? | very small |
Complete the table.
Complete the sentences about the structure of an atom.
Use words from the list: charge, mass, nucleus, shells, volume
Protons and neutrons are found in the ...... of the atom. Electrons are arranged in ...... around the nucleus. Most of the ...... of an atom is in the nucleus.
An atom has the same number of protons and electrons.
Explain why an atom has no overall charge.
A sodium atom has an atomic number of 11 and a mass number of 23.
How many neutrons are in this sodium atom?
51 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.