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Name:___________________________________ Date:___________ Block:_______ THE ATOM 1. TERM DEFINITION atom nucleus protons neutrons electrons quarks isotope ion 3. THE NUCLEUS OF AN ATOM : (No Charge) NEUTRON QUARKS NUCLEUS PROTON (Positive Charge) QUARKS John Dalton J. J. Thomson Ernest Rutherford Niels Bohr Electron Cloud Model THE ATOM 1. THE NUCLEUS OF AN ATOM: TERM DEFINITION atom The smallest particle into which an element can be divided and still be the same substance. nucleus The tiny, extremely dense, positively charged region in the center of an atom. protons The positively charged particles in the nucleus. neutrons The particles in the nucleus that have no charge. electrons The negatively charged particles found in all atoms. quarks The smaller particles that make up protons and neutrons. isotope An atom which has a different number of neutrons then it should. ion An atom which has a different number of electrons then it should. 3. (No Charge) NEUTRON QUARK NUCLEUS NEUTRON QUARK Draw and label Figures 2, 4, 6, 8, 9 on Pages 281-286. John Dalton J. J. Thomson Ernest Rutherford Niels Bohr Electron Cloud Model
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