AQA GCSE Isotopes
Practice Questions
1. State the definition of an isotope
Isotopes are atoms of the same element, with the same number of protons, but different number of neutrons.
2. State the number of protons, neutrons and electrons in carbon-14
Mass number = 14, atomic number = 6
Protons = 6
Neutrons = 8 (14-6)
Electrons = 6
3. Explain why carbon-13 is not radioactive, but carbon-14 is radioactive
Carbon 13 has the correct ratio of protons to neutrons in the nucleus, but carbon 14 has an incorrect ratio of protons to neutrons in the nucleus, so its nucleus is unstable and will undergo radioactive decay
Absorption and Emission of EM Radiation
JJ Thomson and Plum pudding model
Ernest Rutherford and the Nuclear Model
Niels Bohr changing the Nuclear Model
Discovering the Proton and Neutron
Measuring radiation from radioactivity
Radiation types and properties
Random nature of radioactive decay
Radioactive contamination or irradiation
Hazards of contamination and irradiation
Studies on the effects of radiation on humans
Different half lives of radioactive isotopes
Nuclear Fission Chain Reaction
Writing nuclear fission equations