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CHEMISTRY > Atomic History > Flashcards

Atomic History Flashcards

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1
Q

Proposed that matter was made up of tiny indivisible particles

A

Democritus

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2
Q

Conducted combustion experiments that led to the law of conservation of matter

A

Antoine Lavoisier

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3
Q

Definite proportions

Law of constant composition- a given compound always contains the same elements in the same proportion by mass

A

Joseph Proust

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4
Q

Who’s model of an atom was a marble?

A

Dalton

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5
Q

Elements are composed of small particles called atoms

Atoms are neither created nor destroyed in a chemical reaction

A

Daltons atomic theory

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6
Q

Atoms of a particular element are identical, BUT different from atoms of all other elements

A

Daltons atomic theory

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7
Q

Discovered 2 charges

Called them positive and negative

A

Franklin

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8
Q

First related the structure of atoms to electricity

A

Faraday

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9
Q

Figured out what charges protons, neutrons, and electrons have

A

Faraday

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10
Q

A metal surface for electrons to enter/exit

A

Electrode

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11
Q

Negatively charged electrode

A

Cathode

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12
Q

Positively charged electrode

A

Anode

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13
Q

Evacuated glass tube with cathode on one end, anode on the other, electrons flow from one end to the other

A

Cathode ray tube

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14
Q

What did JJ Thomson use

A

A cathode ray tube

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15
Q

Determined the charge of the electron was negative

A

JJ Thomson

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16
Q

Plum pudding model

A

JJ Thomson

17
Q

Who discovered radioactivity by accident? By putting uranium rock on photographic film and it developed the film

A

Henri Becquerel

18
Q

The spontaneous emission of particles, energy, or both

A

Radiation

19
Q

What r the 3 types of radiation?

A

Alpha
Beta
Gamma

20
Q

A particle
Contains 2 protons and 2 neutrons
+2 charge

A

Alpha

21
Q

Particle
-1 charge
High speed electron that is born in the nucleus

A

Beta

22
Q

Energy (not a particle)

No charge, no mass

A

Gamma

23
Q

Who conducted gold foil experiment?

A

Rutherford

24
Q

What r the two conclusions Rutherford came to?

A
  • positively charged nucleus

- Atom is mostly empty space

25
Q

Oil drop experiment

Determined the mass and charge of an electron

A

Millikan

CHEMISTRY (10 decks)

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