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19 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Dalton Atom Theory
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Billiard Ball Model
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1805 |
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Thomson Atomic Theory
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Plum Pudding / Raisin Bun
Positive sphere with electron raisins |
1903 |
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Rutherford's Nuclear Model of the Atom
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gold foil exp.
Classified alpha, beta, 'curl' radiation ZAS detector on other side gave off flash of lite when hit with alpha particle some bounced bak 2 lead plate |
1911 |
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Chadwick
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discovered neutron. "When bombarded with high speed particles, a beam of rays travelling at 1/10 speed of light and unaffected by magnetic fields was emitted"
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1932 |
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Problem With Planetary Model of the Atom?
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Moving Charges (e-'s) shud giv off radiant energy (light) i.e. they wud lose energy and spiral into nucleus but they DONT
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The Hydrogen Spectrum
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violet, blue-violet, green, red
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! ! ! ! |
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drops to 3rd level
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Paschen series (IR) -->infrared
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drops to 1st level
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Lyman series (UV)-->ultraviolet
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drops to second level
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Balmer Series (visible)
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In Balmer Series: Red
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3rd to 2nd
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In Balmer Series: Green
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4th to 2nd
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In Balmer Series: Blue-Violet
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5th to 2nd
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Violet
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6th to 2nd
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What is the state of greatest stability for the hydrogen atom? i.e. the unexcited state/ lowest possible energy level?
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n=1
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electron energy level diagram height of diff thingies
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s at bottom
p at top d in middle f at bottom |
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energy expressed in either
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kilocalories/mol
kilojoules/mol |
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surface wher probability of finding an electron is zero is
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nodal surface
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3 things explained by quantum mechanics
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formation of molecules
bond energy why the elements fit into the periodic table |
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one thing not explained by quantum mechanics?
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trajectory an electron follows
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