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Shawn Christensen
Chemistry
5 May, 16:19
Wht is a atom and a nucleus
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Lea Kirk
5 May, 16:30
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Atoms are made up of three particles: protons, neutrons and electrons. Protons and neutrons are heavier than electrons and reside in the center of the atom, which is called the nucleus. Electrons are extremely lightweight and exist in a cloud orbiting the nucleus.
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