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48 Cards in this Set
- Front
- Back
- 3rd side (hint)
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used CRT - e/m of electron Studied canal rays Plum pudding model/ Raisin bread model |
JJ Thompson |
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Oil drop experiment |
Robert Millikan |
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Penetrating rays from CRT that were not reflected by magnetic field = X-ray |
Wilhelm Roentgen |
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Chemicsls spontaneously decompose & give off penetrating rays |
Henri Becquerel |
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Studied Cl, Th Radioactivity Po, Ra |
Marie Curie |
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Alpha scattering expt "Nuclear Atom Model" |
Ernest Rutherford |
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Planetary model |
Niels Bohr |
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Discovered neutron |
James Chadwick |
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Same # n |
Isotones |
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Diff. elements, same mass |
Isobars |
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Atoms of the same element, diff # neutrons |
Isotopes |
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Impossible to determine |
Heisenberg uncertainty principle |
Quantum theories |
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2 electrons same 4 quantum |
Pauli exclusion principle |
Quantum theories |
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"Fill-up" |
Aufbau principle |
Quantum theories |
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Parallel spins |
Hund's rule |
Quantum theories |
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Mass before = mass after |
Law of conservation of mass/matter |
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Chemical compound always has the same composition (%w/w) |
Law of definite composition aka Proust law |
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If 2 elements form >1 compound |
Law of multiple proportion |
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Hydrogen |
1 |
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Li |
7 |
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C |
12 |
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N |
14 |
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O |
16 |
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Na |
23 |
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Mg |
24 |
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Al |
27 |
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P |
31 |
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Cl |
35 |
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K |
39 |
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Ca |
40 |
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Cr |
52 |
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Mn |
55 |
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Fe |
56 |
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Cu |
64 |
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Zn |
65 |
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Ag |
108 |
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Cd |
112 |
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I |
127 |
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Ba |
137 |
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1st extensive list of elementsM vs NM |
Antoine Lavoisler |
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"Law of triads" |
Johann Dobereiner |
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"FATHER OF PERIODIC TABLE" periodic law - Atomic wt. |
Dmitri Mendeleev |
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Periodic law - Atomic no. |
Henry Moseley |
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Discovered transuranic elements Lanthanides then actinides (below) |
Glenn seaborg |
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1/2 distance |
Atomic radius |
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energy needed to REMOVE AN ELECTRON |
Ionization energy |
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ability of a neutral atom to GAIN ELECTRON |
Electron affinity |
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ability to ATTRACT ELECTRON (covalent bond) |
Electronegativity |
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