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19 Cards in this Set

  • Front
  • Back
  • 3rd side (hint)
Dalton Atom Theory
Billiard Ball Model
1805
Thomson Atomic Theory
Plum Pudding / Raisin Bun
Positive sphere with electron raisins
1903
Rutherford's Nuclear Model of the Atom
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
Chadwick
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"
1932
Problem With Planetary Model of the Atom?
Moving Charges (e-'s) shud giv off radiant energy (light) i.e. they wud lose energy and spiral into nucleus but they DONT
The Hydrogen Spectrum
violet, blue-violet, green, red
! ! ! !
drops to 3rd level
Paschen series (IR) -->infrared
drops to 1st level
Lyman series (UV)-->ultraviolet
drops to second level
Balmer Series (visible)
In Balmer Series: Red
3rd to 2nd
In Balmer Series: Green
4th to 2nd
In Balmer Series: Blue-Violet
5th to 2nd
Violet
6th to 2nd
What is the state of greatest stability for the hydrogen atom? i.e. the unexcited state/ lowest possible energy level?
n=1
electron energy level diagram height of diff thingies
s at bottom
p at top
d in middle
f at bottom
energy expressed in either
kilocalories/mol
kilojoules/mol
surface wher probability of finding an electron is zero is
nodal surface
3 things explained by quantum mechanics
formation of molecules
bond energy
why the elements fit into the periodic table
one thing not explained by quantum mechanics?
trajectory an electron follows