CLASS: 9 (Humanities) GENERAL SCIENCE UNIT # 05 IMPORTANT DEFINITIONS Electrons Negatively charged atomic particles spinning around the nucleus are called electrons. Energy The ability to do work is called energy. Fission The splitting of nucleus of an atom into smaller nuclei is called fission. Fusion The change of a substance from solid to liquid state is called fusion. OR The joining together of two atomic nuclei is called fusion. Heat The internal energy of a body ...
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