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chemistry > chap 4 atomic structure > Flashcards

chap 4 atomic structure Flashcards

1
Q

democritus

A

the idea of the atom

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2
Q

john dalton

A

first atomic theory

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3
Q

what was the first atomic theory?

A
  1. atoms
  2. elements are the same
  3. compounds
  4. reactions
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4
Q

j.j. thomson

A

electron

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5
Q

what did j.j. thomson invent/use?

A

cathorade tube

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6
Q

what is the mass of an electron?

A

1/1860 mass of hydrogen

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7
Q

aristotle

A

matter is continious

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8
Q

ernest rutherford

A

discovered the nucleus

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9
Q

what did rutherford shoot through gold foil?

A

alpha particles

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10
Q

what is an alpha particle?

A

helium nucleus

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11
Q

robert miliken

A

invented the oil drop experiment

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12
Q

niels bohr

A

planetary model “bohr diagram”

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13
Q

james chadwick

A

discovered neutrons

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14
Q

what is the mass of a proton?

A

1/12 12C isotope

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15
Q

what is the atomic number?

A

number of protons in an atom

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16
Q

what is a negative charged electron?

A

negative = anion

17
Q

what is a positive charged electron?

A

positive = cation

18
Q

mendeleev

A

listed elements by atomic mass

19
Q

what is the modern periodic table listed by?

A

atomic number

20
Q

henry mosley

A

listed periodic table according to increasing atomic number

21
Q

what is the diff between periods and groups?

A

periods : horizontal rows

groups : vertical columns

22
Q

quantum theory

A

describes and predicts behavior of electrons in an atom

23
Q

Heisenberg’s uncertainty principle

A

it is impossible to know exactly the velocity and position of a particle at the same time

24
Q

Robert Millikan improved the work of Thomson by describing both the

A

charge and mass

25
Q

high level to lower level (absorption/emission)

lower level to high level (emission/absorption)

A

emission

absorption

chemistry (4 decks)

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