Edexcel IGCSE Biology: Double Science 復(fù)習筆記 1.2.4 Prokaryotic Organisms Prokaryotes All living organisms can be grouped or ‘classified’ using a classification system that consists of?five...
Edexcel IGCSE Biology: Double Science 復(fù)習筆記 1.2.3 Eukaryotic Organisms: Fungi & Protoctists Fungi Main features of fungi: They are?usually multicellular?but some are?single-cel...
Nuclear Decay Equations Alpha Decay An alpha particle consists of?2 protons and 2 neutrons (It is emitted from large unstable nuclei) When an alpha particle is emitted from a nucleus: The nuc...
Edexcel IGCSE Biology: Double Science 復(fù)習筆記 1.2.2 Eukaryotic Organisms: Animals & Plants Animals The main features of animals: They are?multicellular Their cells contain a?nucleus?wit...
Edexcel IGCSE Biology: Double Science 復(fù)習筆記 1.2.1 Eukaryotic Organisms Common Features of Eukaryotic Organisms: Basics All living organisms can be grouped or 'classified' using a c...
Alpha, Beta & Gamma Particles Some elements have nuclei that are unstable This tends to be when the number of nucleons does not balance In order to become more stable, they emit particle...
Background Radiation Radiation is a natural phenomenon, with radioactive elements having always existed on Earth and in outer space However, human activity has added to the amount of radiation that...
Nuclear Fusion Fusion is defined as: Small nuclides that combine together to make larger nuclei, releasing energy Low mass nuclei (such as hydrogen and helium) can undergo fusion and release energy...
Binding Energy per Nucleon Graph When comparing the stability of different nuclei, it is useful to look at the?binding energy?per nucleon The binding energy per nucleon is defined as: The binding e...
