Transcription of Unit 1 Atomic Structure and Nuclear Chemistry
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Unit 1 Atomic Structure and Nuclear Chemistry
Unit1 Atomic Structureand Nuclear ChemistryIntroduction to the atom Modern Atomic Theory Atoms cannot be subdivided, created, or destroyed in ordinary chemical reactions. However, these changes CAN occur in Nuclear reactions! Every atom has different properties from other atoms All matter is composed of atomsEx: grinding down a gold ringModern Atomic TheoryTheory -A set of tested hypotheses that gives an overall explanation of some natural : Cell theory & Evolutionary theoryWait, it s only a theory? Why are we learning it then? A theory is a powerful term in scienceWe can now see atoms.
The Atomic Scale… most pictures are really inaccurate! nucleus (protons and neutrons) is small and dense and contains most of the mass of the atom. The electron cloud (where electrons are found) contain most of the volume (3-D space) of an atom.
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