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Chemistry Semester 1 Exam Review 2025

Total questions: 83

Worksheet time: 2hrs 30mins

Name
Class
Date
1.
How would you write 4.3756 x 104 in standard form?
a)
437,560,000
b)
0.00043756
c)
43,756
d)
4,3756
2.
What does the 6 represent above the C
a)
Symbol 
b)
Name 
c)
Mass Number 
d)
Atomic Number 
3.
Cations are _______ that form ____________ ions and __________ electrons.
a)
nonmetals, positive, lose
b)
nonmetals, negative, gain
c)
metals, positive, gain
d)
metals, positive, lose
4.
Anions are _______ that form ____________ ions and __________ electrons.
a)
nonmetals, positive, lose
b)
nonmetals, negative, gain
c)
metals, positive, gain
d)
metals, positive, lose
5.
How would you write 0.0005 in scientific notation?
a)
50 x 105
b)
5 x 10^-4 
c)
5 x 103
d)
.5 x 103
6.
If an atom gains 3 electrons, what charge will it have as an ion?
a)
+3
b)
-3
c)
+5
d)
-5
7.
What does the following ion mean
              Na +1
a)
sodium gains an electron
b)
sodium loses an electron
c)
sodium gains a proton
d)
sodium loses a proton
8.

Find the density of a cube that has a volume of 8cm3 and a mass of 64 g.

a)

6 cm3

b)

12 g/cm3

c)

128 g/cm3

d)

8 g/cm3

9.
Which of the following is an example of a mixture?
a)
Water
b)
Oxygen
c)
Sodium Chloride
d)
lemonade
10.
What does the following ion mean 
                      S-2
a)
sulfur gains 2 electrons
b)
sulfur loses 2 electrons
c)
sulfur gains 2 protons
d)
sulfur loses 2 protons
11.
Which of the following is an example of a chemical change?
a)
boiling water
b)
crushing a can
c)
tearing a paper
d)
burning a paper
12.
Which state of matter has a definite shape and volume?
a)
solid
b)
liquid
c)
gas
d)
plasma
13.
How many protons does an atom of Carbon have?
a)
6
b)
4
c)
12
d)
14
14.
Which group of elements on the periodic table has properties that include being brittle, dull and poor conductors?
a)
semimetals
b)
non metals
c)
alkali metals
d)
transition metals
15.
In the formula, MgCl2, what does the 2 tell you?
a)
Chlorine has 2 valence electrons
b)
Chlorine has a 2+ charge
c)
Chlorine has a 2- charge
d)
There are 2 Chlorine atoms
16.
Which of the following is nitrate?
a)
NO-
b)
NO2-
c)
NO3-
d)
NO4-
17.
What is the name of Mg(OH)2?
a)
Magnesium Hydride
b)
Magnesium Dihydride
c)
Magnesium Dihydroxide
d)
Magnesium Hydroxide
18.

What is the correct name for this polyatomic ion: OH–

a)

hydrogen carbonate

b)

oxonium

c)

hydroxide

d)

acetate

19.

What is the correct formula for the polyatomic ion called ammonium?

a)

NH3+

b)

NH3

c)

CN+

d)

NH4+

20.

The phosphate ion is written as

a)

PO-3

b)

PO3-4

c)

PO4-3

d)

PO4+3

21.

The sulfate ion is written as

a)

SO-2

b)

SO4-2

c)

SO3-2

d)

SO4+2

22.

Nitrate is a polyatomic ion that has a formula that looks like

a)

NO-1

b)

NO4-1

c)

NO3-1

d)

NO3+1

23.
CN-
a)
cyanide
b)
carbon nitride
24.
CO32-
a)
carbon oxide
b)
carbonate
25.
ClO3-
a)
chlorite
b)
chlorate
26.
C2H3O2-
a)
acetate
b)
carbon hydroxide
27.
CrO42-
a)
chromium oxide
b)
chromate
28.
What is the name of Al(NO3)3?
a)
Aluminum trinitrate
b)
Monoaluminum nitrate
c)
Aluminum (III) nitrate
d)
Aluminum Nitrate
29.

MnO4-

a)

permanganate

b)

dichromate

c)

perchlorate

d)

chromate

30.

nitrite

a)

N3-

b)

NO32-

c)

NO2-

d)

NO4-

31.
Na +  and  S -2
a)
Na2S
b)
NaS2
c)
Na2S2
d)
NaS
32.
The chemical formula for an ionic compound of potassium and oxygen is
a)
KO.
b)
K2O.
c)
K2O2.
d)
KO2.
33.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
34.
When naming ionic compounds, the cation is always named first and the anion is always named second.
a)
False
b)
True
35.
How do the following two elements bond together?
Al3+  O2-         
a)
AlO
b)
Al2O3
c)
Al3O6
d)
Al3O2
36.
What charge does a calcium (Ca) ion have?
a)
+1
b)
+2
c)
+3
d)
+4
37.
What would be the proper chemical formula for combining Al3+ and l- :
a)
Al l3
b)
Al3l
c)
Al l
d)
Al3 l3
38.
Which is the charge that results when oxygen becomes an ion?
a)
+3
b)
+2
c)
-2
d)
-3
39.

Which formula correctly represents the compound magnesium cyanide?

a)

MgCN

b)

Mg(CN)2

c)

MgCN2

d)

Mg2CN

40.
What is the correct chemical formula for nickel (II) nitride?
a)
NiN
b)
Ni(NO3)2
c)
NiNO3
d)
Ni3N2
41.
The proper formula for aluminum nitrate:
a)
AlNO3
b)
Al2(NO3)3
c)
Al(NO3)3
d)
Al3NO3
42.
Name the following ionic compound: MgSO4
a)
magnesium sulfoxide
b)
magnesium sulfide
c)
magnesium sulfate
d)
magnesium oxide
43.
Name the following ionic compound: Cr(NO2)3
a)
chromium nitrite
b)
chromium nitride
c)
chromium III nitride
d)
chromium III nitrite
44.
The proper formula for tin (IV) sulfite
a)
Sn2SO3
b)
Sn2SO2
c)
SnSO
d)
Sn(SO3)2
45.

What is the name of the compound Na2(SO4)?

a)

Sodium sulfate

b)

Sodium sulfide

c)

Sodium sulfite

d)

Sodium sulfuroxide

46.

The name of the compound Ca3(PO4)2

a)

calcium phosphate

b)

tricalcium diphosphate

c)

calcium phosphorus oxide

d)

calcium phosphide

47.

What is the formula for copper(I) sulfate?

a)

CuSO3

b)

CuSO4

c)

Cu2SO3

d)

Cu2SO4

48.

What is the name of the compound CuCl2?

Hint: What type of metal is Cu?

a)

Copper Chloride

b)

Copper (I) Chloride (II)

c)

Copper (II) Chloride

d)

none of the above

49.

What is the name of the compound SnO2?

Hint: What type of metal is Sn?

a)

Tin Oxide

b)

Tin Dioxide

c)

Tin (IV) Oxide

d)

Tin (II) Oxide

50.
A binary covalent bond exists between
a)
2 metals
b)
1 metal and 1 nonmetal
c)
2 nonmetals
d)
Any 2 elements
51.
What is the correct name for C4H6?
a)
Carbon Hexahydride
b)
Pentacarbon Pentahydride
c)
Hexacarbon Tetrahydride
d)
Tetracarbon Hexahydride
52.
What is the correct name for NO?
a)
Mononitrogen Monoxide
b)
Nitrogen Monoxide
c)
Mononitrogen Dioxide
d)
Nitrogen Oxide
53.
What is the formula for Tricarbon Octahydride?
a)
Ca3O
b)
C2H8
c)
C3H8
d)
Ca3H8
54.
P2O5
a)
Phosphorus Oxide
b)
Pentaphosphorus Dioxide
c)
Diphosphorous pentoxide
d)
Phosphoric Oxygen
55.
What is the molar mass of table salt (NaCl)?
a)
116.886 g/mol
b)
35.453 g/mol
c)
22.990 g/mol
d)
58.443 g/mol
56.
What is the mass of one mole of aluminum?
a)
27 g
b)
13 g
c)
54 g
d)
14 g
57.

Calculate the molar mass of Ba(C2H3O2)2

a)

255.3 g/mol

b)

237.3 g/mol

c)

228.3 g/mol

d)

196.3 g/mol

58.
a)
scoopula
b)
ring stand
c)
beaker
d)
crucible
59.
What is used to protect your eyes from chemicals, broken glass, and fire?
a)
Fire blanket
b)
Eye wash
c)
Goggles
d)
Flask
60.
What is used to hold test tubes?
a)
Test tube rack
b)
Magnifying glass
c)
Petri dish
d)
Funnel
61.
Identify the equipment shown here:
a)
acetylene torch
b)
flame thrower
c)
alcohol burner
d)
Bunsen burner
62.

Identify the equipment shown here:

a)

beaker holder

b)

iron ring

c)

forceps

d)

test tube clamp

63.

Identify the equipment shown here:

a)

beaker

b)

erylenmeyer flask

c)

test tube

d)

graduated cylinder

64.
Identify the equipment shown here:
a)
crucible
b)
evaporating dish
c)
mortar and pestle
d)
bowl
65.

What is measured with a graduated cylinder?

a)

Passage of time

b)

Distance from one thing to another

c)

Weight of an object

d)

Volume of liquid

66.

If you spill or break something during an experiment, what is the FIRST thing you should do?

a)

Tell Mrs. Roach

b)

Clean it up.

c)

Cover it with a paper towel.

d)

Leave it for someone else.

67.

What is used to measure (but not precise), heat, and mix large amounts of liquids?

a)

beaker

b)

flask

c)

test tube

d)

graduated cylinder

68.
The following is what type of reaction:
PbCl2 + AgNO3 → Pb(NO3)2 + AgCl
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
69.
The following is what type of reaction:
NH3 + HCl  → NH4Cl
a)
Synthesis
b)
Decomposition
c)
Single Replacement Replacement
d)
Double Replacement Replacement
70.
What type of chemical reaction is this?
Al(OH)3 → Al2O3  + H2O
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement 
71.

3Ca + 2AlCl3 --> 3CaCl2 + 2Al

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

72.
One reactant into several products.
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
73.
Two Reactants and One Product
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
74.
C4H12 + O2 → CO2 + H2O
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
75.

What reaction has the following general formula:

AB --> A + B

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

76.

What reaction has the following general formula:

A + CD --> C + AD

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

77.
24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?
a)
74.92 amu
b)
24.97 amu
c)
75.01 amu
d)
74.51 amu
78.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
79.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
80.
Balance this equation
_N2 + _H2 --> _NH3
a)
1,2,3
b)
1,3,2
c)
1,1,2
d)
2,1,1
81.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
82.
Which side of a chemical equation is the product side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
83.
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1

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