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Che1 > Ch 2 Lec 1 - Atoms & the Atomic Theory > Flashcards

Ch 2 Lec 1 - Atoms & the Atomic Theory Flashcards

1
Q

mass can be neither created nor destroyed

A

law of conservation of mass

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2
Q

total mass of reactants will be the same as the total mass of products

A

law of conservation of mass

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3
Q

all samples of a certain compound have the same composition or the same proportion of elements

A

law of constant composition

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4
Q

Three assumptions of dalton’s atomic theory and dates lived

A

1766 - 1844

  1. elements have indivisible atoms and atoms cannot be created nor destroyed
  2. all atoms of an element have same mass and properties
  3. in a compound, atoms are combined in simple numerical ratios
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5
Q

man who discovered electrons and year

A

faraday 1820s

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6
Q

electrons were discovered using a blank

A

cathode ray tube

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7
Q

this man observed deflection of cathode rays in this year with applied electric field (moved toward + plate)

A

jj thomson

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8
Q

this man concluded that cathode rays are negatively charged particles present in all atoms

A

jj thomson

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9
Q

charge of an electron

A

-1.6022 x 10^-19 C

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10
Q

this man determined mass and charge of electron in this year

A

robert millikan 1914

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11
Q

mass of electron

A

9.1094 x 10^-28 g

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12
Q

used oil drop experiment

A

robert millikan

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13
Q

this man observed fluorescence of materials outside the cathode ray tube while the tube was operating in this year

A

wilhelm roentgen 1895

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14
Q

roentgen called unknown radiation blank

A

x rays

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15
Q

high energy form of radiation

A

x rays

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16
Q

this man discovered radioactivity in this year

A

henri becquerel 1900s

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17
Q

spontaneous emission of radiation from certain elements (unstable)

A

radiation

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18
Q

this man identified two types of radiation

A

ernest rutherford

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19
Q

two types of radiation discovered by rutherford

A
  1. alpha particles +2 charge, same core as He2+

2. Beta particles, -1 charge, same as electron

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20
Q

this man discovered the third type of radiation

A

paul villard

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21
Q

radiation discovered by Villard

A

gamma rays

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22
Q

these two men came up with the atom model after experimenting with alpha particles

A

hans geiger and ernest rutherford

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23
Q

three parts of model proposed by geiger and rutherford

A
  1. most mass and all + charge are in nucleus
  2. magnitude of the + charge is different for every element
  3. # of electrons outside nucleus was equal to positive charges in nucleus
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24
Q

+ charges in the nucleus were renamed blank by rutherford in 1919

A

protons

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25
Q

neutral particles in the nucleus (blank) were discovered by James Chadwick in 1932

A

neutrons

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26
Q

mass = blank + blank

A

protons, neutrons

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27
Q

mass number goes on blank

A

top

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28
Q

atomic number goes on blank

A

bottom

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29
Q

atomic number = number of blank

A

protons

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30
Q

= mass number - atomic number

A

number of neutrons

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31
Q

atoms with the same number of protons but different mass numbers (neutrons)

A

isotopes

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32
Q

charged atom (gained or lost electrons)

A

ions

33
Q

upon formation of a nucleus, very little blank is lost as energy

A

mass

34
Q

mass of an individual atom blank equal the mass of all protons, neutrons, electrons

A

does not

35
Q

this measures the mass of an atom

A

mass spectrometer

36
Q

average of the isotopic masses, weighted according to the naturally occurring abundances of the isotopes of the element

A

atomic mass

37
Q

formula for atomic mass

A

(abundance of isotope 1 x mass of isotope 1) + (abundance of isotope 2 x mass of isotope 2)

38
Q

Name the following atomic numbers….

A

example) 1 - Hydrogen

39
Q

1

A

hydrogen

40
Q

2

A

helium

41
Q

3

A

lithium

42
Q

4

A

beryllium

43
Q

5

A

boron

44
Q

6

A

carbon

45
Q

7

A

nitrogen

46
Q

8

A

oxygen

47
Q

9

A

fluorine

48
Q

10

A

neon

49
Q

11

A

sodium

50
Q

12

A

magnesium

51
Q

13

A

aluminum

52
Q

14

A

silicon

53
Q

15

A

phosphorus

54
Q

16

A

sulfur

55
Q

17

A

chlorine

56
Q

18

A

argon

57
Q

The next ones are symbols…

A

example) K - potassium

58
Q

Cr

A

chromium

59
Q

Sr

A

strontium

60
Q

Fr

A

Francium

61
Q

Pt

A

platinum

62
Q

Ga

A

gallium

63
Q

Ge

A

germanium

64
Q

As

A

arsenic

65
Q

Se

A

selenium

66
Q

Kr

A

krypton

67
Q

Ra

A

radium

68
Q

Rn

A

radon

69
Q

In

A

indium

70
Q

Sn

A

Tin

71
Q

Sb

A

Antimony

72
Q

Te

A

tellurium

73
Q

Tl

A

thallium

74
Q

Bi

A

bismuth

75
Q

Po

A

polonium

76
Q

At

A

astatine

77
Q

Kelvin temperature equation

A

Temp Celsius + 273.15

78
Q

Celsius equation

A

5/9(temp Fahrenheit-32)

79
Q

Fahrenheit equation

A

(9/5 x temp Celsius) + 32

Che1 (14 decks)

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