Atom 05
Atom 05 : Nuclear Energy and Nuclear Disasters. All materials are made of atoms. The elements, such as iron, lead, and sulfur, differ from each other because their atomic structures are different. The word atom comes from the Greek word meaning indivisible. We now know it can be split and consists of an inner core (nucleus) surrounded by electrons that rotate around the nucleus. As a chemical unit, it remains unchanged during any chemical reaction, yet may undergo nuclear transmutations to other atoms, as in atomic fission
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