IB DP Physics: SL复习笔记7.3.2 Quarks & Leptons
Quarks & Leptons Quarks Quarks are fundamental particles that make up other subatomic particles such as protons and neutrons Protons and neutrons are in a category of particles called hadrons H...
IB DP Physics: SL复习笔记7.3.1 Discovery of the Nucleus
The Rutherford-Geiger-Marsden Experiment Evidence for the structure of the atom was discovered by Ernest Rutherford in the beginning of the 20th century from the study of α-particle scattering The ...
IB DP Physics: SL复习笔记7.2.4 Binding Energy per Nucleon Curve
Binding Energy per Nucleon Curve In order to compare nuclear stability, it is more useful to look at the binding energy per nucleon The binding energy per nucleon is defined as: The binding energy ...
IB DP Physics: SL复习笔记7.2.3 Nuclear Fission & Fusion
Nuclear Fission & Fusion Nuclear Fusion Fusion is defined as: The joining of two small nuclei to produce a larger nucleus Low mass nuclei (such as hydrogen and helium) can undergo fusion and re...
IB DP Physics: SL复习笔记7.2.2 Mass Defect & Nuclear Binding Energy
Mass Defect & Nuclear Binding Energy Energy & Mass Equivalence Einstein showed in his Theory of Relativity that matter can be considered a form of energy and hence, he proposed: Mass can be...
IB DP Physics: SL复习笔记7.2.1 Atomic Mass Unit
Atomic Mass Unit The unified atomic mass unit u is roughly equal to the mass of one proton or neutron: 1u = 1.66 × 10−27 kg It is sometimes abbreviated to a.m.u This value will be given on your dat...
IB DP Physics: SL复习笔记7.1.9 Investigating Half-Life
Investigating Half-Life Aim of the Experiment The aim of the experiment is to investigate the half-life of a decaying radioactive sample This can be done with a live sample if safe access is availa...
IB DP Physics: SL复习笔记7.1.8 Half-Life
Half-Life It is impossible to know when a particular unstable nucleus will decay But the rate at which the activity of a sample decreases can be known This is known as the half-life Half-life is de...
IB DP Physics: SL复习笔记7.1.7 Decay Equations
Decay Equations Changes in N and Z by Radioactive Decay There are four reasons why a nucleus might become unstable, and these determine which decay mode will occur Too many neutrons Decays through ...
