WorksheetsChemistry Unit 2
Total questions: 79
Worksheet time: 40mins
Name
Class
Date
1.
Oxygen and iron are...
a)
elements
b)
compounds
c)
heterogeneous mixtures
d)
homogeneous mixtures
2.
H2O and C6H12O6 are...
a)
elements
b)
compounds
c)
heterogeneous mixtures
d)
homogeneous mixtures
3.
Gravel and trail mix are...
a)
elements
b)
compounds
c)
heterogeneous mixtures
d)
homogeneous mixtures
4.
Chocolate and air are...
a)
elements
b)
compounds
c)
heterogeneous mixtures
d)
homogeneous mixtures
5.
Solutions are a type of ___ where one substance is dissolved into another.
a)
element
b)
compound
c)
heterogeneous mixture
d)
homogeneous mixture
6.
In sweet tea, the solvent is...
a)
tea leaves
b)
water
c)
sugar
7.
In saltwater, the solute is...
a)
water
b)
salt
c)
fish
d)
saltwater
8.
The smallest piece of an element that retains all the properties of that element is a(n)...
a)
atom
b)
solute
c)
solvent
d)
compound
9.
Which subatomic particle is in the nucleus?
a)
protons
b)
neutrons
c)
electrons
d)
both protons and neutrons
10.
Which subatomic particle has a positive charge?
a)
protons
b)
neutrons
c)
electrons
d)
both protons and neutrons
11.
Which subatomic particle has a negative charge?
a)
protons
b)
neutrons
c)
electrons
d)
both protons and neutrons
12.
Which subatomic particle has no charge?
a)
protons
b)
neutrons
c)
electrons
d)
both protons and neutrons
13.
Which 2 subatomic particles react with the electromagnetic force?
a)
protons and neutrons
b)
protons and electrons
c)
neutrons and electrons
14.
Which 2 subatomic particles react with the strong nuclear force?
a)
protons and neutrons
b)
protons and electrons
c)
neutrons and electrons
15.
Which subatomic particle determines which element the atom will be?
a)
protons
b)
neutrons
c)
electrons
16.
If an atom has a positive charge, it's called a(n)...
a)
isotope
b)
anion
c)
cation
d)
nucleus
17.
If an atom has a negative charge, it's called a(n)...
a)
isotope
b)
anion
c)
cation
d)
nucleus
18.
Which subatomic particle changes which isotope the atom will be?
a)
protons
b)
neutrons
c)
electrons
19.
Which subatomic particle determines if the atom will have an ionic charge?
a)
protons
b)
neutrons
c)
electrons
20.
Which subatomic particle determines how the atom will bond with other atoms?
a)
protons
b)
neutrons
c)
electrons
21.
Which subatomic particle determines if the nucleus is stable or will undergo radioactive decay?
a)
protons
b)
neutrons
c)
electrons
22.
Which neon isotope has 10 protons, 11 neutrons, and 10 electrons?
a)
Neon-19
b)
Neon-20
c)
Neon-21
d)
Neon-31
23.
How many neutrons does 39K+ have?
a)
19
b)
39
c)
20
d)
58
24.
How many protons does 39K+ have?
a)
19
b)
39
c)
20
d)
58
25.
How many electrons does 39K+ have?
a)
19
b)
18
c)
20
d)
58
26.
Why aren't electrons counted in mass number?
a)
They're too small
b)
They have a negative charge
c)
They aren't in the nucleus
d)
They don't have mass
27.
When an unstable nucleus emits energy or particles, it's called...
a)
radiation
b)
fusion
c)
ionization
d)
fission
28.
Which force must be overcome for nuclear fusion to take place?
a)
strong nuclear force
b)
electromagnetic force
c)
gravity
d)
centripetal force
29.
Atomic bombs split the nuclei of atoms. This is called...
a)
nuclear fission
b)
nuclear fusion
c)
radiation
d)
electromagnetism
30.
How many protons are in a 56Fe3+ cation?
a)
56
b)
26
c)
29
d)
23
31.
How many electrons are in a 56Fe3+ cation?
a)
56
b)
26
c)
29
d)
23
32.
How many neutrons are in a 56Fe3+ cation?
a)
56
b)
26
c)
29
d)
30
33.
How many protons does 31P3- have?
a)
15
b)
31
c)
12
d)
18
34.
How many neutrons does 31P3- have?
a)
15
b)
16
c)
12
d)
18
35.
How many electrons does 31P3- have?
a)
15
b)
16
c)
12
d)
18
36.
Which phase of matter has a definite shape and a definite volume?
a)
solid
b)
liquid
c)
gas
d)
plasma
37.
Which phase of matter has a definite volume, but not a definite shape?
a)
solid
b)
liquid
c)
gas
d)
plasma
38.
Which phase of matter doesn't have a definite shape or volume, but is not ionized?
a)
solid
b)
liquid
c)
gas
d)
plasma
39.
Which phase of matter doesn't have a definite shape or volume and is ionized?
a)
solid
b)
liquid
c)
gas
d)
plasma
40.
Milk going sour is a...
a)
physical change
b)
chemical change
41.
Cutting aluminum in half is a...
a)
physical change
b)
chemical change
42.
Butter melting in a skillet is a...
a)
physical change
b)
chemical change
43.
Water evaporating from the surface of the ocean is a...
a)
physical change
b)
chemical change
44.
Rust forming on a nail is a...
a)
physical change
b)
chemical change
45.
An onion turns brown as it is cooked. This is a...
a)
physical change
b)
chemical change
46.
solid to gas
a)
condensation
b)
evaporation
c)
sublimation
d)
deposition
47.
gas to solid
a)
condensation
b)
evaporation
c)
sublimation
d)
deposition
48.
gas to liquid
a)
condensation
b)
evaporation
c)
sublimation
d)
deposition
49.
liquid to gas
a)
condensation
b)
evaporation
c)
sublimation
d)
deposition
50.
solid to liquid
a)
condensation
b)
evaporation
c)
melting
d)
freezing
51.
liquid to solid
a)
condensation
b)
evaporation
c)
melting
d)
freezing
52.
If I have 6 carbons in the reactants of an equation, I must have 6 carbons in the products. This is because of the law of...
a)
multiple proportions
b)
definite proportions
c)
conservation of matter
d)
universal gravitation
53.
Items present BEFORE a chemical reaction are called...
a)
reactants
b)
products
c)
catalysts
d)
coefficients
54.
Items present AFTER a chemical reaction are called...
a)
reactants
b)
products
c)
catalysts
d)
coefficients
55.
Anything that helps a chemical reaction occur, but is not itself reacting is called a...
a)
reactant
b)
product
c)
catalyst
d)
coefficient
56.
Where are catalysts written in a chemical equation?
a)
above the yield arrow
b)
with the products
c)
with the reactants
d)
in front of the yield arrow
57.
The small numbers that indicate how many atoms are present in the compound, like the 2 in H2O, are called...
a)
reactant
b)
coefficients
c)
subscripts
d)
exponents
58.
The numbers in front of a compound that indicate how many molecules of that compound are present, like the 3 in 3FeCl2, are called...
a)
reactants
b)
coefficients
c)
subscripts
d)
exponents
59.
How many O2 molecules will there be in the balanced equation?
C3H8 + O2 --> H2O + CO2
C3H8 + O2 --> H2O + CO2
a)
5
b)
3
c)
4
d)
6
60.
What coefficient should be before F2 in the balanced equation?
Xe + F2 --> XeF6
Xe + F2 --> XeF6
a)
5
b)
3
c)
4
d)
6
61.
What coefficient should be before MnS in the balanced equation?
MnS + HCl --> H2S + MnCl2
MnS + HCl --> H2S + MnCl2
a)
none (1)
b)
3
c)
4
d)
2
62.
What coefficient should appear before Pb(NO3)2 in the balanced equation?
PbCrO4 + HNO3 --> Pb(NO3)2 + H2CrO4
PbCrO4 + HNO3 --> Pb(NO3)2 + H2CrO4
a)
none (1)
b)
2
c)
3
d)
4
63.
Balance the equation and determine how many O atoms are reacting.
CuSO4 + KCN --> Cu(CN)2 + K2SO4
CuSO4 + KCN --> Cu(CN)2 + K2SO4
a)
4
b)
8
c)
12
d)
16
64.
Balance the equation and determine how many water molecules are reacting.
H3AsO4 --> As2O5 + H2O
H3AsO4 --> As2O5 + H2O
a)
2
b)
3
c)
6
d)
12
65.
An AMU is a unit of mass equal to the mass of 1...
a)
proton
b)
electron
c)
carbon atom
d)
water molecule
66.
Which particle is NOT made of smaller particles called quarks?
a)
protons
b)
neutrons
c)
electrons
67.
The average kinetic energy of vibrating atoms is measured as...
a)
temperature
b)
density
c)
chemical energy
d)
radioactivity
68.
Aqueous means...
a)
dissolved in water
b)
in the plasma state
c)
it has evaporated
d)
it's collecting condensation
69.
Which two factors determine phase of matter? Pick two.
a)
pressure
b)
temperature
c)
volume
d)
mass
70.
After a chemical reaction, a powder comes out of solution and settles at the bottom of a test tube. This is a...
a)
condensate
b)
precipitate
c)
evaporate
d)
sublimate
71.
Which of these is NOT a pure substance?
a)
He
b)
O2
c)
CaCO3
d)
saltwater
72.
Ionic bonds are between...
a)
two or more metals
b)
metals and nonmetals
c)
two or more nonmetals
73.
Covalent bonds are between
a)
two or more metals
b)
two or more nonmetals
c)
metals and nonmetals
74.
Which compounds form molecules?
a)
covalent compounds
b)
ionic compounds
75.
Which compounds form crystals and are recognized by formula units?
a)
covalent compounds
b)
ionic compounds
76.
The smallest piece of an CaCl2 compound would be a(n)...
a)
molecule
b)
formula unit
c)
atom
77.
The smallest piece of an CO2 compound would be a(n)...
a)
molecule
b)
formula unit
c)
atom
78.
The smallest piece of Cu would be a(n)...
a)
molecule
b)
formula unit
c)
atom
79.
Bronze is a combination of copper and tin metals. Bronze is a(n)...
a)
alloy
b)
ionic compound
c)
covalent compound
d)
solution
100 %
