GCSE Combined Science: Atomic Structure and Nuclear Radiation Quiz

What is the approximate radius of an atom?

• 1 × 10⁻¹⁰ meters
• 1 × 10⁻⁸ meters
• 1 × 10⁻¹² meters
• 1 × 10⁻⁶ meters

Which part of the atom contains most of its mass?

• Electron cloud
• Nucleus
• Protons
• Neutrons

What happens to electrons when electromagnetic radiation is absorbed?

• They move closer to the nucleus
• They move further from the nucleus
• They become neutrons
• They emit gamma rays

What is the charge of an atom with equal numbers of protons and electrons?

• Positive
• Negative
• Neutral
• Variable

What is the term for atoms of the same element with different numbers of neutrons?

• Isotopes
• Ions
• Molecules
• Compounds

What model replaced the plum pudding model of the atom?

• Bohr model
• Nuclear model
• Quantum model
• Rutherford model

Who provided evidence for the existence of neutrons?

• Niels Bohr
• James Chadwick
• Ernest Rutherford
• Albert Einstein

What is the process called when a nucleus emits radiation to become more stable?

• Nuclear fusion
• Radioactive decay
• Nuclear fission
• Ionization

Which type of radiation consists of two protons and two neutrons?

• Alpha particles
• Beta particles
• Gamma rays
• Neutrons

What is the unit of measurement for radioactive activity?

• Curie
• Becquerel
• Sievert
• Gray