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Chemistry > Chapters 3 & 4 > Flashcards

Chapters 3 & 4 Flashcards

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0
Q

Aristotle

A

Thought all matter was composed from earth, wind, fire and water

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1
Q

Democritus

A

Believed everything was composed of atoms

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2
Q

Law of conservation of mass

A

Lavoisier, created by dalton and gave good ideas about atoms

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3
Q

Law of Definite Proportions

A

Specific substances always contain elements in the same ratio by mass

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4
Q

Dalton’s atomic theory

A
  1. All matter is composed of tiny indivisible partials called atoms
  2. Atoms of the same element are alike and atoms of different elements are different
  3. Atoms combine in simple whole number ratios to form compounds
  4. Atoms cannot be created or destroyed, just rearranged in chemical change
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5
Q

Thomson

A

Worked with cathode day tube, discovered electrons

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6
Q

Anode

A

Positive terminal

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7
Q

Cathode

A

Negative terminal

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8
Q

Rutherford

A

Gold foil experiment, found it was densely packed with positive charge

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9
Q

Proton

A

Positive charge, found in nucleus

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10
Q

Neutron

A

No charge, found in nucleus

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11
Q

Electron

A

Negative charge, found in electron cloud

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12
Q

Atomic number

A

The number of protons

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13
Q

Atomic mass

A

Total number of protons and neutrons

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14
Q

Isotopes

A

Atoms of the element that differ in mass number

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15
Q

Ground state

A

Lower energy level

16
Q

Excited state

A

Higher energy level

17
Q

Longer wavelength, green or yellow?

A

Yellow

18
Q

Higher frequency and X-ray or a microwave

A

X-ray

19
Q

Which light travels faster, ultraviolet or infrared light

A

Same, all light travels at 3•10^8 m/s

20
Q

How are frequency and wavelength related

A

When wavelength increases frequency decreases and viscera

21
Q

Wavelength

A

Distance between crests

22
Q

Frequency

A

Number of wave cycles

23
Q

Quantum

A

Minimum amount of energy that can be lost or gained by an atom

Chemistry (3 decks)

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