chap2atomrevised30A

chap2atomrevised30A - Structure of the Atom 2 Atom-book- in...

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1 Structure of the Atom 2 Atom-book- in one letter i contains more atoms than seconds in 10 billion years. 500 B.C. everything is composed of atoms. *overhead of atomic theory. A) subatomic particles- what atoms are composed of. electrical charge symbol mass proton positive(+) P 1 amu neutron neutral N 1 amu electron negative(-) e' 0 amu * show overhead, atom football stadium P 1.7 x 10 -24 g nucleus contains protons and neutrons. B) Atomic number- electron nucleus
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2 atomic number = protons (determines element) 1800's Mendeleev organized elements by reactivity. Formed the periodic chart by number of protons. If atom is neutral #protons = #electrons *show overhead of periodic table. show halogens, metals, period and group, transition metals metals- 1. shiny solids. 2. Good conductors of heat and electricity. 3. ductile and malleable 4. high m.p. Non-metals- 1. poor conductors. 2. non-malleable or ductile. 3.
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This note was uploaded on 09/02/2011 for the course CHEM 30a taught by Professor Harrison during the Spring '11 term at West Valley.

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chap2atomrevised30A - Structure of the Atom 2 Atom-book- in...

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