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Magnet Chemistry > Unit 2 > Flashcards

Unit 2 Flashcards

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1
Q

What was Democritus known for?

A

Developed the 1st ideas of atomic structure

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2
Q

What are the 4 components of Dalton’s Atomic Theory?

A
  1. Matter is composed of small indivisible particles
  2. An element is composed entirely of one type of element
  3. Compounds contain atoms of 2 or more different elements
  4. Atoms do not change their identities in chemical reactions
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3
Q

Who discovered the electron and what did he use to discover it?

A

JJ Thomson, with cathode ray tubes

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4
Q

Developed the Plum Pudding Model

A

JJ Thomson

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5
Q

Who conducted the gold foil experiment?

A

Rutherford

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6
Q

What were discovered in the gold foil experiment?

A
  1. Alpha particles have a helium nucleus

2. Proved existence of a positively-charged nucleus

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7
Q

Who discovered the nucleus?

A

James Chadwick (in 1932)

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8
Q

What is the order of the evolving atomic models?

A
  1. Democritus
  2. Thomson’s Plum Pudding Model
  3. Rutherford’s model
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9
Q

Ion

A

Atom in which there are more or less electrons than protons

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10
Q

What is radioactivity?

A

Loosing energy to gain stability

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11
Q

What are the types of radiation

A
  1. Alpha
    particle
  2. Beta Particle
  3. Gamma Particle
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12
Q

What are the 4 types of radioactive decay?

A
  1. Alpha Decay
  2. Beta Decay
    3 Positron Emmision
  3. Electron Capture
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13
Q

neutron symbol

A

^1_0 n

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14
Q

Proton symbol

A

^1_1 p

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15
Q

Fission

A

Splitting of a nucleus into smaller nuclei

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16
Q

Fusion

A

Combines 2 small nuclei to make one larger one

17
Q

What temp. Is needed for a thermonuclear reaction to occur?

A

40,000,000K to sustain it

18
Q

How many tons of coal does 1g of fission file create

A

3 tons of coal

19
Q

How many tons of coal does 1g of fusion fuel create?

A

20 tons of coal

20
Q

What is a half-life?

A

The time required for half the atoms of a radioactive nuclei de to decay.

21
Q

What does a shorter half life mean?

A

The nuclide is less stable.

Magnet Chemistry (3 decks)

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