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Atomic Structure

Spec 4.4 Paper 1 📗 Foundation

Subtopics

The Structure of an AtomSpec 6.4.1.1Describe the structure of an atom including the nucleus, protons, neutrons and electrons. + Mass Number, Atomic Number and IsotopesSpec 6.4.1.2Define atomic number, mass number and isotopes and interpret nuclear notation. + Development of the Model of the AtomSpec 6.4.1.3Describe how the model of the atom developed from solid sphere to nuclear model. + Radioactive Decay and Nuclear RadiationSpec 6.4.2.1Describe alpha, beta and gamma radiation, their properties and uses and dangers. + Nuclear EquationsSpec 6.4.2.2Write and balance nuclear equations for alpha and beta decay. + Half-Lives and Radioactive DecaySpec 6.4.2.3Define half-life, calculate remaining activity and explain the random nature of decay. + Radioactive ContaminationSpec 6.4.2.4Distinguish contamination from irradiation and explain the hazards and precautions for each. +

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Key Equations

A = N/t (activity)

Count rate ÷ 2 per half-life

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