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Science 57 Chemistry Quiz
Flashcards
50 cards
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Questions
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Answers
1
Which one of the following is not a heterogeneous mixture:
emulsion
colloid
suspension
2
A solution is a heterogeneous mixture with particles greater than 1000 nm in diameter.
True
False
3
An element is:
made up of one type of atom.
two or more different atoms joined together.
two or more atoms joined together.
4
Kelvin has negative values.
False
True
5
What is so special about the elements in each group on the Periodic Table?
They are the same color.
They have similar properties.
They all have the same size.
6
A chemical formula shows:
how many compounds there are.
how many molecules there are.
How many atoms there are.
7
How many types of bonding are there?
6
3
4
5
8
An ion has either a positive charge or a negative charge.
True
False
9
How many naturally occurring elements are there?
118
94
millions
10
The image shows a:
ionic bond.
hydrogen bond.
double covalent bond.
11
A compound is:
two or more atoms of the same kind joined together.
two or more different kinds of atoms joined together.
made up of one atom.
12
How do you chemically separate water?
Electrolysis.
Boil it.
Freeze it.
Cut it.
13
Electrons in an atom are found in something called electron shells.
True
False
14
Chemistry is an attempt to understand everything around us.
False
True
15
An isotope has:
More neutrons.
More protons.
More electrons.
16
An element's symbol is either one or two letters.
True
False
17
You can't get to absolute zero because:
The thermometer breaks.
More energy is always needed.
The scale doesn't go down that far.
18
A compound is very different from the substances it is made of.
False
True
19
Each atom has the same number of electron shells.
False
True
20
The valence electrons are:
the inner most shell electrons.
the outer shell electrons.
21
How did chemistry start?
Fire
Democritus
The Romans
22
If the atom or molecule has the same number of protons as electrons, the charge will be zero.
True
False
23
Through chemistry, one of the things the Romans made was:
big armies
plumbing
lead framed windows
24
The images shows a:
single covalent bond.
hydrogen bond.
ionic bond.
25
How many horizontal rows are in the Periodic Table?
7
18
8
10
26
The image shows a:
hydrogen bond.
single covalent bond.
triple covalent bond.
double covalent bond.
27
Which of the following separation method depends on density?
Centrifugation.
Distillation.
Decantation.
Magnetic separation.
28
Electron shells are also energy levels.
False
True
29
Some elements have been made in the laboratory.
False
True
30
Bonding happens with the outer electrons in the atom.
True
False
31
Gas in a gas (like the air we breath) is a mixture.
False
True
32
A molecule is:
made up of one type of atom.
two or more atoms of the same kind joined together.
two or more different kinds of atoms joined together.
33
Alloys are:
made with fire or heat
all are correct
metals
probably happened by accident
34
Which of the following is a pure substance?
a 14k gold ring.
an element.
35
You can break an atom into smaller pieces.
False
True
36
I know more about chemistry now than I did before this unit.
True
False
37
Pure substances can can be separated by physical means.
True
False
38
1 Kelvin equals 1 degree Celsius.
True
False
39
The image shows a:
hydrogen bond.
single covalent bond.
ionic bond.
triple covalent bond.
40
The bond in the image represents:
a hydrogen bond.
a single covalent bond.
a double covalent bond.
41
Electrons have a negative charge.
False
True
42
All compounds are molecules, but not all molecules are compounds.
False
True
43
Which method of separation depends on particle size?
Filtration.
Magnetic separation.
Distillation.
Centrifugation.
44
Which part of a solution is the biggest part?
Solute
Solvent
45
Which is not one of the four elements Aristotle thought existed?
Air
Wind
Earth
Fire
46
Mixtures can be separated.
True
False
47
Protons have a positive charge.
True
False
48
Which method of separation depends on boiling point?
Centrifugation.
Decantation.
Distillation.
Filtration.
49
Milk is a:
homogeneous mixture.
heterogeneous mixture.
50
An alloy is a pure substance.
False
True
