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Chem 111 > History Of Chem > Flashcards

History Of Chem Flashcards

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0
Q

Mass of proton

A

1.67E-24

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1
Q

Mass of electron

A

9.11E-28

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2
Q

Mass of neutron

A

1.67E-24

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3
Q

J. J. Thomson

A

Cathode ray showed negative charge and calculated mass of electron by difference of diffraction

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4
Q

Goldstein

A

Observed positively charged particles when perforated cathode plate was introduced. Not protons but residual gas

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5
Q

Soddy

A

Studied radioactive decay and proposed multiple masses which led to isotopes

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6
Q

Millikan

A

Measured charge on electron. Was able to use this to calculate mass.

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7
Q

Heisenberg

A

Uncertainty principle

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8
Q

Chadwick

A

Discovered neutron 1932

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9
Q

Marie Currie

A

Discovered Polonium and Radium
Unit of radioactivity and element named after her
Received two Nobel prices

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10
Q

Joseph Thompson

A

Discovered electron. Plum Pudding Model

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11
Q

Stern and Gerlach

A

Electron’s Spin

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12
Q

Becquerel

A

Radioactivity

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13
Q

Rutherford

A

Discovered proton. Beta particles from gold foil experiment.

Identified alpha, beta, gamma

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14
Q

Alpha particle

A

He 2+

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15
Q

Beta particle

A

Electron

16
Q

Gamma particle

A

High energy light

17
Q

Crooks Tube Experiment

A

Charge/mass ratio

18
Q

Millikans oil drop

A

Charge on electron

19
Q

Rutherfords gold foil

A

Charge distribution in atom, performed experiment to convert on atom into another

20
Q

Becquerels photographic film experiment

A

Radioactivity

21
Q

Röntgens evacuated crooks tube

A

Production of X-rays

22
Q

Mendeleev and Meyer

A

Cocreators of the periodic table

23
Q

Geiger and Marsden

A

Bombarded gold foil with alpha particles

24
Q

Moseley

A

Ordered episodic table by atomic numbers

25
Q

Goldstein

A

Discovery of anode rays

26
Q

Planck

A

First to hypothesize quantinization of energy.

Chem 111 (3 decks)

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