Atomic StructureAQA GCSE Physics 8463

Atoms and Isotopes

Work through the notes, try the practice questions, then take the quiz. The report tells you exactly what to revise next. (2026)

Practice progress

6 MCQs

0 of 6 attempted

Correct

Incorrect

Remaining

1
An atom's radius is about:
Answer & explanation
Correct: option B
Atom ≈ 10⁻¹⁰ m.
2
Charge of a proton:
Answer & explanation
Correct: option C
Proton +1; electron −1; neutron 0.
3
Compared with the atom, the nucleus is approximately:
Answer & explanation
Correct: option C
Atom 10⁻¹⁰ m ; nucleus 10⁻¹⁵ m → 10⁵ times smaller.
4
Mass of an electron compared with a proton:
Answer & explanation
Correct: option C
Electron ~ 1/2000 proton mass.
5
Electrons orbit:
Answer & explanation
Correct: option B
Discrete energy levels (shells).
6
When an electron drops to a lower energy level, it:
Answer & explanation
Correct: option B
Drop down → emit photon of EM radiation.

Atomic StructureAQA GCSE Physics 8463

Work through the notes, try the practice questions, then take the quiz. The report tells you exactly what to revise next. (2026)

6 MCQs

0 of 6 attempted

Correct

Incorrect

Remaining

1
An atom's radius is about:
Answer & explanation
Correct: option B
Atom ≈ 10⁻¹⁰ m.
2
Charge of a proton:
Answer & explanation
Correct: option C
Proton +1; electron −1; neutron 0.
3
Compared with the atom, the nucleus is approximately:
Answer & explanation
Correct: option C
Atom 10⁻¹⁰ m ; nucleus 10⁻¹⁵ m → 10⁵ times smaller.
4
Mass of an electron compared with a proton:
Answer & explanation
Correct: option C
Electron ~ 1/2000 proton mass.
5
Electrons orbit:
Answer & explanation
Correct: option B
Discrete energy levels (shells).
6
When an electron drops to a lower energy level, it:
Answer & explanation
Correct: option B
Drop down → emit photon of EM radiation.