What is the atomic number (proton number) of an atom?
The total number of neutrons in the nucleus of an atom.
The total number of protons in the nucleus of an atom.
The total number of protons and neutrons in the nucleus of an atom.
The total number of protons, neutrons, and electrons in an atom.
77 exam-style questions on OCR GCSE Chemistry Atomic structure. Each one has a worked solution and a mark scheme showing where the marks go.