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Chemistry > Chemistry, Mid-term exam - 11 > Flashcards

Chemistry, Mid-term exam - 11 Flashcards

1
Q

Hydrogen is…

A

H

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2
Q

H is…

A

Hydrogen

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3
Q

Barium is…

A

B

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4
Q

B is…

A

Barium

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5
Q

Argon is…

A

Ar

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6
Q

Ar is…

A

Argon

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7
Q

Lithium is…

A

Li

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8
Q

Li is…

A

Lithium

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9
Q

Phosphorus is…

A

P

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10
Q

P is…

A

Phosphours

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11
Q

Beryllium is…

A

Be

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12
Q

Be is…

A

Beryllium

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13
Q

Lead is…

A

Pb

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14
Q

Pb is…

A

Lead

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15
Q

Aluminium is…

A

Al

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16
Q

Al is…

A

Aluminium

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17
Q

Iron is…`

A

Fe

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18
Q

Fe is…

A

Iron

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19
Q

Manganese is…

A

Mn

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20
Q

Mn is…

A

Manganese

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21
Q

Calcium is…

A

Ca

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22
Q

Ca is…

A

Calcium

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23
Q

Platinum is…

A

Pt

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24
Q

Pt is…

A

Platinum

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25
Q

Silver is…

A

Ag

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26
Q

Ag is…

A

Silver

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27
Q

Nitrogen is…

A

N

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28
Q

N is…

A

Nitrogen

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29
Q

Bromine is…

A

Br

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30
Q

Br is…

A

Bromine

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31
Q

Oxygen is…

A

O

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32
Q

O is…

A

Oxygen

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33
Q

Iodine is…

A

I

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34
Q

I is…

A

Iodine

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35
Q

Gold is…

A

Au

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36
Q

Au is…

A

Gold

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37
Q

Chronium is…

A

Cr

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38
Q

Boron is…

A

B

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39
Q

B is…

A

Boron

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40
Q

Mercury is….

A

Hg

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41
Q

Hg is…

A

Mercury

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42
Q

Sodium is…

A

Na

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43
Q

Na is…

A

Sodium

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44
Q

Tin is…

A

Sn

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45
Q

Sn is…

A

Tin

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46
Q

Neon is…

A

Ne

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47
Q

Ne is…

A

Neon

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48
Q

Potassium is…

A

K

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49
Q

K is…

A

Potassium

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50
Q

Chlorine is…

A

Cl

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51
Q

Cl is…

A

Chlorine

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52
Q

Nickel is…

A

Ni

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53
Q

Ni is…

A

Nickel

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54
Q

Fluorine is…

A

F

55
Q

F is…

A

Fluorine

56
Q

Silicon is…

A

Si

57
Q

Si is…

A

Silicon

58
Q

Copper is

A

Cu

59
Q

Cu is…

A

Copper

60
Q

Magnesium is…

A

Mg

61
Q

Mg is…

A

Magnesium

62
Q

Zinc is…

A

Zn

63
Q

Zn is…

A

Zinc

64
Q

Carbon is…

A

C

65
Q

C is…

A

Carbon

66
Q

Helium is…

A

He

67
Q

He is…

A

Helium

68
Q

you must classify by matter of 3/6 things…

A

atom or molecule, element or compound, pure or mixture.

69
Q

an atom is…

A

smallest unit of matter .

70
Q

a molecule is…

A

structure that contains multiple atoms bonded.

71
Q

a element is…

A

pure substanced composed in only one type of atom.

72
Q

compound is…

A

substance formed of 2 or more different types of elements.

73
Q

to be pure means…

A

has a single kind of matter. (all the same)

74
Q

a mixture is…

A

mixture of 2 or more substance which each has its own chemical idenity.

75
Q

a chemical formula written as 1 is…

A

pure

76
Q

a characteristic property is…

A

used to identify or classify into a group.

77
Q

physical properties are both…

A

qualitative and quantiative.

78
Q

colour is…

A

physical, qualitative

79
Q

state @ SATP is…

A

physical qualitative

80
Q

clarity is…

A

physical qualitative.

81
Q

odour is…

A

physical qualitative.

82
Q

conductivity is…

A

physical qualitative.

83
Q

ductility is…

A

physical qualitative.

84
Q

chemical is…

A

changes and behavior of matter

85
Q

reaction with water, air (oyxgen) is…

A

chemical

86
Q

reaction with acid is…

A

chemical

87
Q

catching on fire or carroding is…

A

chemical

88
Q

the 4 signs a chemical reaction has taken place is…

A

gas is formed (see or smell something), precipitate is formed (a solid forms when 2 solutions ar emixed), energry is released or absorbed (heat, light, sound or electricity), a new UNEXPECTED colour.

89
Q

mallebility is…

A

physical qualitative change.

90
Q

lustre is…

A

physical qualitative change.

91
Q

magnetic is…

A

physical qualitative change.

92
Q

soluble is…

A

physical qualitative change.

93
Q

Quantiative means…

A

measured and assigend a numeric value with units.

94
Q

melting point is…

A

physical quantitaive.

95
Q

boiling point is…

A

physical quantiative.

96
Q

density is…

A

physical quantitative.

97
Q

mass is…

A

physical quantitative

98
Q

volume is…

A

physical quantitative.

99
Q

temperature is…

A

physical quantitative.

100
Q

texture is…

A

physical quantitative.

101
Q

how do you always know if a physical or chemical change has taken place?

A

Physical changes the apperance or form, but the kind of matter in the substance does not.
Chemical change is the matter changes and at least 1 new substance with new properties.

102
Q

what is the order of the history of atomic theory?

A
  1. four element model.
  2. atomic model.
  3. aristatle
  4. the alchemists
  5. john dalton, later atomic model
  6. the muffin model, jj thompson
  7. the nucelear model, ernest rutherford.
  8. niels bohr denmark, revised nuclear model
  9. james chadwick,
103
Q

what is the four element mode?

A

all matter is made up of four elements: earth, fire, water + air
each element is a mixture of 2
no scientific proof

104
Q

what is the atomic model?

A

all matter is made up of tiny particles called atoms –> atoms are invisible, indivisible and indestructable.
based on the though that you can only cut something so small
properties are based on shape and arrangement - ie, closely packed = strong

105
Q

State the creator, place and year of the four element model

A

empedocies, in greece - 450 BCE

106
Q

State the creator, place and year of the atomic model

A

Decmocritus, Greece, 400 BCE

107
Q

What did Aristate do and when?

A

he rejected the atomic model and adopted the 4 element model again in 350 BCE

108
Q

what did the alchemists do and when

A

contributed very little due to their work being based on the 4 element model in 300CE

109
Q

What did John Dalton do?

A

created the atomic theory that all matter is made up of tiny particles in 1808

110
Q

what is the John Dalton model?

A

Muffin model - the muffin is a positively charged model with electrons spread throughout like chocolate chips.

111
Q

who made the muffin model?

A

JJ Thompson

112
Q

What did Ernest Rutherford make?

A

Nuclear model - established the nucles and thought that most of the atoms space is empty space and that where the electrons are is a “electron cloud”.

113
Q

How was the nucleus found and by who?

A

Ernest Rutherford founded the existence of the nucleus by bombarding thin metal sheets with energy rays and particles from radioactive elements, from a pattern of particles bouncing off or not passing through the metal he founded the nucleus.

114
Q

What did Niels Bohr Denmark do?

A

created the revised nuclear model - electrons do not move around randomly but move in fixed energy levels or shells around the nucleus. energy can excite elements and make them glow - he knows them from his spectroscope experiment.

115
Q

What is the revised nuclear model and who founded it?

A

Niels Bohr Denmark created the revised nuclear model - electrons do not move around randomly but move in fixed energy levels or shells around the nucleus. energy can excite elements and make them glow - he knows them from his spectroscope experiment.

116
Q

what was the experiement that prooved that electrons move in fixed energy levels?

A

Spectroscope - measured the spectrum of light. Light given by each element consists of particular wave length swith a unique pattern

117
Q

what is the james chadwick model?

A

another revised nuclear model - founded the neutron in the nuceus by an experiment where he bombarded beryllium with fast moving heilium where beams of light were given off but the beam is not affected by magnets or charged objects therefore the beam must be made of uncharged particles.

118
Q

a subatomic particle is…

A

proton, neutron and electron.

119
Q

proton.

A

found in the nucleus, charge of 1amu, charge of 1+ (positive) and is the atomic mass/number - top left.

120
Q

electron.

A

foun din space around nucleus in energy levels/shells. has a chage of 1- (negative), doesn’t even make up an a.m.u, equal to # of protons (if the same charge) or - charge from # of protons.

121
Q

neutrons.

A

found in the nucleus, has no charge (netural), mass of 1amu, # of protons - mass number = # of neutrons.

122
Q

what did the cathode ray tube experiement proove and by who?

A

JJ Thompson prooved the discovery of protons and that all atoms contain negatively charged particles/electrons.

123
Q

what is the gold foil experiment and by who?

A

Ernest Rutherford conducted an experiement where he set up a very thin piece of gold foil set up in a flourescent then shot alpha particles at the foil expecting it to pass thoruhg however some bounced back which caused the discovery of the nucleus ( a solid dense core). Rutherford proposed that the rest is empty space, allowing particles to pass through.

124
Q

what is an isotope?

A

same element that contains equal # of protons but different # of neutrons. (same atomic # but different mass #). Same chemical and physical properties.

125
Q

how to calculate AAM.

A

AAM= (mass of {u}) (%abundance) +

126
Q

what is a radioisotope?

A

radioactive isotope.

127
Q

what is nuclear fission?

A

a broken down nucleus which causes a nucelear reaction causing a release of huge amounts of energy.

128
Q

what are the 3 main types of nuclear reactions?

A

Alpha, Beta and Gamma.

129
Q

alpha radiation.

A

release of helium nucleus. relatively slow moving and low energy, travels only a few cm through air, can be stopped by piece of paper.

130
Q

beta radiation.

A

release of electron (1e-). relatively high energy - faster than alpha radiation, travels a few m through air, can be stopped by a piece of metal 1-2mm thick,

131
Q

gamma radiation.

A

very high energy, moves at light speed, travels unlimited distance, can be stopped by 1-2 of PB or concrete.

132
Q

half live is

A

time required for a radio isotope to decay by 1/2

133
Q

low wavelength - short wavelength

A

low wavelength = low energy, red.
short wavelength= high energy, purple.

134
Q
A

Chemistry (2 decks)

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