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Atoms_and_Quantum_Numbers_F10

Atoms_and_Quantum_Numbers_F10 - Atoms and Quantum Numbers...

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1 Atoms and Quantum Numbers GLY 4200 – Lecture 5 –Fall, 2010
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2 Atom Grossly oversimpliflied view of atom, but it does have a nucleus and electron cloud
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3 Nucleons Protons – charge of +1 Neutrons – neutral, with a mass slightly greater than the proton Atomic number = number of protons, often denoted z Atomic number is designated as a left subscript to the chemical symbol - 1 H, 14 Si
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4 Atomic Weight The atomic weight equals the number of protons plus neutrons Atomic weight is shown as a left superscript to the chemical symbol, such as 16 O
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5 Isotopes One element may have one or more numbers of neutrons: 1 1 H is normal hydrogen, with one proton and no neutrons 1 2 H is deuterium, or heavy hydrogen, with one proton and one neutron 1 3 H is tritium, a radioactive form of hydrogen, with one proton and two neutrons Collectively, the different types of the atoms of one element are called isotopes
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6 Ions Cation - the atom has lost electrons, so there
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