5.1.2 — The nucleus

Core

• 5.1.2.1 — Describe the composition of the nucleus in terms of protons and neutrons
• 5.1.2.2 — State the relative charges of protons, neutrons and electrons as +1, 0 and −1 respectively
• 5.1.2.3 — Define proton number (Z) and nucleon number (A) and calculate number of neutrons
• 5.1.2.4 — Use nuclide notation A/Z X
• 5.1.2.5 — Explain what is meant by an isotope and state that elements may have more than one isotope

Supplement

• 5.1.2.6 — Describe nuclear fission and fusion as splitting or joining of nuclei, including nuclide equations and qualitative changes in mass and energy
• 5.1.2.7 — Know the relationship between proton number and nuclear charge
• 5.1.2.8 — Know the relationship between nucleon number and relative mass of a nucleus