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Study the word list: GCSE Physics: Radioactivity 1

Key words for GCSE Physics

Word list: GCSE Physics: Radioactivity 1

atom An atom is the smallest particle of an element that can exist.
proton A proton has a positive charge and is found in the nucleus of an atom.
neutron A neutron has no charge and is found in the nucleus of an atom.
electron An electron is part of an atom that has a negative charge. Electrons are found in shells.
nucleus The nucleus is the centre of an atom and has a positive charge.
nuclei Nuclei is the plural of nucleus.
isotope An isotope is an atom that contains the same number of protons but different numbers of neutrons.
source The source of something is the place where it comes from.
alpha Alpha particles contain two protons and two neutrons.
beta A beta particle is a high-speed electron.
particle A beta particle is a high-speed electron.

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