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nuclear structure radioactivity
A LevelPhysics~4 min read
Overview
This lesson introduces the fundamental structure of the atomic nucleus, exploring its constituents and the forces holding it together. We will also delve into the phenomenon of radioactivity, understanding its different forms and the underlying processes of nuclear decay.
The Atomic Nucleus: Structure and Composition
The atomic nucleus is the dense, positively charged core of an atom, comprising protons and neutrons, collectively known as **nucleons**. The number of protons defines the **atomic number (Z)**, which determines the element. The sum of protons and neutrons is the **mass number (A)**. Neutrons contri...
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Key Concepts
- Nucleon: A collective term for protons and neutrons found in the atomic nucleus.
- Isotope: Atoms of the same element (same number of protons) but with different numbers of neutrons.
- Strong Nuclear Force: The fundamental force responsible for holding protons and neutrons together in the nucleus, overcoming electrostatic repulsion.
- Radioactivity: The spontaneous emission of radiation from unstable atomic nuclei.
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Exam Tips
- →Clearly distinguish between atomic number (Z) and mass number (A), and how they change in different types of radioactive decay.
- →Be able to write balanced nuclear equations for alpha, beta-minus, and beta-plus decay, ensuring conservation of mass number and atomic number.
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