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Mid Term Exam Review Theory 23 24 Flashcards | StudBud
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Mid Term Exam Review Theory 23 24
Mid Term Exam Review Theory 23 24
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cumulative review of chemistry course #chemistry
Flashcards
57 cards
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Questions
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Answers
1
Which set of atoms have the same number of energy levels (shells)?
Li, Al, Ge
C, N, O
B, Al, Ga
F, Cl, Br
2
Chemical changes happen
because bonds are broken and atoms rearrange
All of the above
because a chemical reaction occurs
because atoms rearrange and new bonds are formed
3
What elements make up CO
2
?
chlorine and oxygen
oxygen and cobalt
carbon and oxygen
carbon and hydrogen
4
Qualitative Data is:
data with amounts
numerical data
ahahshshhd sir yes sir
non-numerical data
5
True or False: Atoms gain protons to become positively charged ions.
true
false
6
How can you identify a compound by its physical properties?
all the above
color
density
melting point
7
Who's theory of atomic structure is sometimes called the "planetary" model?
Ernest Rutherford
John Dalton
J. J. Thompson
Niels Bohr
8
What are the evidences of a chemical change?
Color change, gas, light, temperature change, precipitate
Concession, garbage, liability, biodiversity
Melting, rotting, cooking
9
What is this method of separation?
Filtration
Crystallisation
Evaporation
Distillation
10
what are the states of matter
rock, paper, scissors
solid, liquid, gas, plasma
rock, paper, scissors, lizard Spock
11
Is gathering data a part of the scientific method?
No
Yes
Maybe
Idk
12
Who's theory of atomic structure is sometimes called the "nuclear" model?
Niels Bohr
J. J. Thompson
John Dalton
Ernest Rutherford
13
How many elements are there?
100
118
92
21
14
What does the atomic number identify?
The number of neutrons of a given atom.
The number of protons + neutrons of a given atom.
The number of protons of a given atom.
The number of elections of a given atom.
15
you are matter
False
True
16
Chemistry is the study of
the origin & history of the Earth.
composition & properties of matter.
the universe beyond Earth.
living things.
17
What are physical properties?
Observed by a chemical change or chemical reaction
Properties that are used to observe and describe matter.
18
What is the definition matter
pickles
electricity
Air and space
anything that takes up space and has mass
19
How can you tell physical and chemical properties apart ?
Just the overall appearance of the properties will change
The chemical nature of matter will be altered/stay the same.
Only the color of the matter will change.
Nothing can tell the properties apart.
20
What state of matter has a set volume?
Solid
Liquid
Gas
21
The atomic number here is
16
2-
8
no shown
22
There are _________________________ elements that exist naturally.
24
92
102
116
23
What is the density of an object with a mass of 5 grams and a volume of 10 ml?
0.5 g/ml
2 g/ml
5 g/ml
10 g/ml
24
Homogeneous mixtures are also called
atoms.
compounds.
solutions.
molecules.
25
Which set of atoms have similar properties?
C, Si, Ge
Fe, Co, Ni
B, C, N
Li, Be, B
26
WHAT METHOD OF SEPARATION WOULD YOU USE TO SEPARATE A MIXTURE OF ETHANOL AND WATER?
Distillation
magnetisim
Centrifugation
Separating funnel
27
Is cutting a beet a chemical or physical change?
Physical
Chemical
28
Is rust an example of a physical change or chemical change
Physical
Chemical
29
Chemical properties are only observed when a chemical change is happening.
True
False
30
what is a mixture?
a mix of atoms or molucules
matter that is made of one type of atom or molucule
31
Which of the following is a mixture?
orange juice
Oxygen
Zinc
lithium
32
What determines the order of elements on todays periodic table?
Decreasing atomic mass
Decreasing atomic number
Increasing atomic number
Increasing atomic mass
33
How many neutrons does the following isotope contain? Nitrogen-17
17
3
7
10
34
Are fireworks exploding an example of a chemical or physical change?
Chemical
Physical
35
What state of matter is this?
This is gas
This is plasma
This is liquid
This is solid
36
... is a pure substance composed of two or more different elements joined by chemical bonds.
compound
colloid
mixture
pure substance
37
What separation Technique is this?
Distillation
Evaporation
Sorting
Filtration
38
How can a mixture be separated?
evaporation
tools
deposition
can be taken out by hands
39
What type of mixture is this?
Homogeneous
Heterogeneous
tom
Tasty mixture
40
What state of matter does NOT flow?
Gas
Liquid
plasma
Solid
41
A sample of matter that has definite chemical and physical properties is...
A pure substance
A mixture
An element
A compound
42
What state of matter has a set shape?
Solid
Liquid
Gas
43
How many valence electrons does the following ion of phosphorous contain? P
-3
5
8
2
3
44
_______ can be separated by physical means.
An element
Pure substances
A compound
A mixture
45
What type of charge would an atomic nucleus have?
Positive
Neutral
Can't answer that!
Negative
46
Quantitative observations are
sometimes words and numbers
words only
numbers only
words and numbers
47
What state of matter is this?
This is solid
This is liquid.
This is gas
This is plasma
48
Is decomposition physical or chemical?
chemical
physical
49
if a mixture is homogeneous, the physical properties and the composition..
are different throughout
are cool
are the same throughout
all of the above
50
The atomic nucleus consists of what particles?
proton and electron
proton and neutron
electron and neutron
proton, neutron, and electron
51
An atom that loses electrons gains a ______ charge.
neutral
negative
positive
silly
52
The first step of the scientific method involves
predicting the result of an experiment
making observations
performing an experiment
forming a hypothesis
53
An atom of carbon with more neutrons is called a(n) ________ of carbon.
isotope
anion
cation
ion
54
What are the 6 branches of chemistry?
organic, physical, chemcial, proton, ion, biochemistry
organic, physical, enviro, analytical, bio, inorganic
inorganic, physical, analytical, bio, anti, theoretical
tech, bio, analytical, organic, enviro, physical
55
Protons have a ________ charge.
negative
evil
neutral
positive
56
What did the gold foil experiment show about atomic structure
The atom is mostly comprised of neutrons
The atom is mostly empty space
The atom is mostly comprised of electrons
The atom is mostly comprised of alpha particles
57
Matter cannot be created or ?
taken away
added
destroyed
blended
