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Chem1110 > Exam 1 > Flashcards

Exam 1 Flashcards

1
Q

base unit for length

A

meter

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2
Q

base unit for mass

A

kg

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3
Q

base unit for time

A

seconds

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4
Q

base unit for temp

A

kelvin

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5
Q

base unit for amt of substance

A

mole

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6
Q

celsius to kelvin

A

C+273.15

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7
Q

celsius to fahrenheit

A

(Cx(9/5))+32

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8
Q

Fahrenheit to celsius

A

(F-32)x(5/9)

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9
Q

Kelvin to celsius

A

K-273.15

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10
Q

density 3 formulas

A

D=M/V
M=DxV
V=M/D

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11
Q

physical change

A

state of matter changes, composition doesn’t
ex: melting

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12
Q

chemical change

A

composition changes
ex: oxidation

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13
Q

Democritus

A

4th century BCE philosopher postulated the existence of an “uncuttable” piece of matter

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14
Q

Dalton

A

atom is indivisible

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15
Q

JJ Thomson

A

discovered electron
cathode ray tube
measured charge to mass ratio for electron

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16
Q

Rutherford

A

atoms are mostly made up of air
positive charge and most of the mass located in nucleus
gold foil experiment

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17
Q

Millikan

A

measured charge on electron and determined its mass
Oil drop experiment

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18
Q

Chadwick

A

discovered the neutron

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19
Q

Ion

A

atom with an unequal number of protons and electrons

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20
Q

protons>electrons

A

positive –> lose electrons

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21
Q

protons<electrons

A

negative –> gain electrons

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22
Q

atomic number

A

number of protons
on bottom

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23
Q

atomic mass

A

number of protons and neutrons
on top

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24
Q

Isotope

A

atom with a different number of neutrons (atomic mass)

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25
Q

does frequency increase or decrease from left to right

A

increase

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26
Q

does energy increase or decrease from left to right

A

increase

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27
Q

does wavelength get longer or shorter from left to right

A

shorter because frequency increases

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28
Q

list the types of waves from lowest to highest frequency/ energy

A

radio wave, microwave, infrared, light, UV, x-ray, gamma ray

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29
Q

einstein photoelectric effect

A

when light strikes a metal surface, electrons are emitted
he figured out that metals like to give up electrons

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30
Q

threshold frequency

A

the minimum frequency of radiation needed for an electron to be emitted

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31
Q

Schrodinger

A

described electron density and atomic orbitals

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32
Q

De Broglie formula

A

wavelength=h/m x v

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33
Q

What De Broglie discover

A

electron can behave like a wave

34
Q

Heisenberg uncertainty

A

can not know position and momentum (velocity) of a particle at the same time

35
Q

principle quantum number n

A

size and energy
<0 whole numbers only

36
Q

angular quantum number l

A

shape
0 - (n-1)

37
Q

l=0 is what orbital

38
Q

l=1 is what orbital

39
Q

l=2 is what orbital

40
Q

l=3 is what orbital

41
Q

magnetic quantum number ml

A

orientation
-l,0,+l

42
Q

spin quantum number ms

A

spin behavior
+1/2 (spin up) or -1/2 (spin down)

43
Q

how does the n value correspond to the l value

A

n value is how many numbers starting at 0 l can be
ex: n=1 -> l=0
n=2 -> l=0,1

44
Q

does first IE increase or decrease from left to right

45
Q

does effective nuclear charge (Zeff) increase or decrease from left to right

46
Q

does electron affinity increase or decrease from left to right

47
Q

does metallic character increase or decrease from left to right

48
Q

does atomic radius increase or decrease from left to right

49
Q

does first IE increase or decrease down a group

50
Q

does effective nuclear charge (Zeff) increase or decrease down a group

51
Q

does electron affinity increase or decrease down a group

52
Q

does metallic character increase or decrease down a group

53
Q

does atomic radius increase or decrease down a group

54
Q

group 1A

A

alkali metals

55
Q

group 2A

A

alkali earth metals

56
Q

group B

A

transition metals

57
Q

groups 3A-7A

A

other metals, metalloids, nonmetals

58
Q

group 8A

A

noble gases

59
Q

isoelectronic

A

two different atoms with the same charge

60
Q

what do groups on the periodic table correspond to

A

number of valence electrons

61
Q

what do periods correspond to

A

n value/E level

62
Q

paramagnetic

A

unpaired valence electrons

63
Q

diamagnetic

A

all valence electrons are paired

64
Q

speed of light formulas

A

c=λv
v=c/λ
λ=c/v

65
Q

light energy formulas

A

E=hv
E=hc/λ

66
Q

s orbital shape

67
Q

p orbital shape

68
Q

d orbital shape

69
Q

f orbital shape

70
Q

extensive property

A

depends on amt of substance
mass of volume

71
Q

intensive property

A

independent of amt of substance
density

72
Q

hypothesis

A

testable explanation which explains observations

73
Q

theory

A

explains data from experiments
explains why not what

74
Q

law

A

mathematical statement that explains how something happens

75
Q

light

A

a form of electromagnetic radiation

76
Q

what is electromagnetic radiation composed of

A

perpendicular oscillating waves one for the magnetic field and one of the electric field

77
Q

s orbital

A

1 orbital (2 electrons)

78
Q

p orbital

A

3 orbitals (6 electrons)

79
Q

d orbital

A

5 orbitals (10 electrons)

80
Q

f orbital

A

7 orbitals (14 electrons)

81
Q

electron configurations

A

description of the orbitals occupied by electrons

Chem1110 (6 decks)

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