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CHEM Unit 3 Review F2022

Total questions: 45

Worksheet time: 45mins

Name
Class
Date
1.
How do covalent bonds form?
a)
Donating & receiving valence e- between atoms.
b)
Opposite slight charges attract each other between compounds.
c)
Scientists are still not sure how they form.
d)
Sharing valence e- between atoms.
2.
What two types of atoms make a covalent bond?
a)
2 Nonmetals
b)
1 Nonmetal and 1 Metal
c)
2 Metals
d)
2 Noble Gases
3.

What kind of bond will form between Hydrogen and Oxygen?

a)

ionic

b)

covalent

c)

metallic

d)

no bond

4.

What kind of bond will Potassium form with Sulfur?

a)

ionic

b)

covalent

c)

metallic

d)

no bond

5.

What charge will a Neon ion have?

a)

+1

b)

-1

c)

-8

d)

Neon does not form ions.

6.
Some are solids, some are liquids, and some are gases at room temperature.
a)
ionic compounds
b)
covalent compounds
7.
Molten compound conducts electricity.
a)
ionic compound
b)
covalent compound
8.
Molten compound does NOT conduct electricity.
a)
ionic compound
b)
covalent compound
9.
Have a high m.p. (1000°C-3000°C)
a)
ionic compounds
b)
covalent compounds
10.
Have a low m.p. (< 200°C)
a)
ionic compounds
b)
covalent compounds
11.
usually hard but brittle
a)
ionic compounds
b)
covalent compounds
12.
forms ions in solution
a)
ionic compounds
b)
covalent compounds
13.
usually soft
a)
ionic compounds
b)
covalent compounds
14.
How many atoms are in the element Carbon in this compound?
H2C3O4N5
a)
2
b)
3
c)
4
d)
5
15.
A subscript is the small number below a(n) ________ that tells the number of _______ of that element.
a)
element symbol; atoms
b)
atom; element symbol
c)
subscript; protons
d)
compound; elements
16.

How many atoms of Oxygen are there in: H2SO4

a)

6

b)

5

c)

4

d)

2

17.

What is the total number of atoms in this formula? H2O2H_2O_2  

a)

2

b)

4

c)

3

18.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
19.

How many oxygen are in Ca(OH)2

a)

2

b)

1

c)

0

d)

4

20.

How many O are in K2(SO4)3

a)

7

b)

3

c)

12

d)

1

21.

Choose the incorrect pairing below:

a)

Cation -> positive

b)

Anion -> negative

c)

Ionic bonding -> metal to metal

d)

Covalent bonding -> nonmetal to nonmetal

22.

An atom must have how many valence electrons to become stable?

a)

6

b)

8

c)

10

d)

12

23.

What is the first step in writing a chemical formula?

a)

Write the multipliers as subscript of each element.

b)

Identify the symbols and charges of the elements.

c)

Balance the charges by looking for multipliers.

24.

Magnesium Nitrate

a)

Mg(NO3)2

b)

Mg (NO3)3

c)

Mg (NO3)

25.

Calcium Hydroxide

a)

Ca(OH)

b)

CaH2

c)

Ca(OH)2

26.

Barium Chloride

a)

BaCL2

b)

BaCl2

c)

BaCl

27.

Na2SO4

a)

Sodium Sulphate

b)

Sodium Sulphite

c)

Sodium Sulphide

28.

(NH4)OH

a)

Ammonium Hydroxide

b)

Aluminium Hydroxide

c)

Ammonium Peroxide

29.

Calcium Phosphate

a)

Ca2(PO4)2

b)

Ca3(PO4)2

c)

Ca2(PO4)2

30.

Zinc Oxide

a)

ZnO

b)

Zn2O2

c)

ZnO2

31.

What is the formula for the Iron (II) ion?

a)

IR4+

b)

Fe2+

c)

IR3+

d)

Fe 4+

32.
How do the following two elements bond together?
K1+  S2- 
a)
KS
b)
K8S
c)
K6S3
d)
K2S
33.
How do the following two elements bond together?
Al3+  O2-         
a)
AlO
b)
Al2O3
c)
Al3O6
d)
Al3O2
34.
How do the following two elements bond together?
Pb4+  O2-       
a)
PbO
b)
Pb2O3
c)
PbO2
d)
Pb3O2
35.
Name the following compound; ScCl2
a)
sulfur dichloride
b)
scandium chloride
c)
scandium (II) chloride
d)
scandium dichloride
36.
Which formula correctly represents aluminum phosphate?
a)
AlPO4
b)
AlSO4
c)
AlP
d)
AlPO3
37.
Gallium sulfate has which of the following formulas?
a)
Ga2S3
b)
Ga3(SO4)2
c)
Ge2(SO4)3
d)
Ga2(SO4)3
38.
What is the name of the following compound; FeCrO4?
a)
iron chromate
b)
iron dichromate
c)
iron (II) chromate
d)
Iron (II) dichromate
39.
CaCO3 is represented best by which name?
a)
calcium bicarbonate
b)
carbonic acid
c)
calcium carbon trioxide
d)
calcium carbonate
40.
Name BCl3
a)
boron chloride
b)
boron (III) chloride
c)
boron trichloride
d)
boron chlorine
41.
Name CCl4
a)
carbon carbon tetraiodide
b)
carbon tetrachloride
c)
monocarbon tetrachloride
d)
water
42.
Give the formula for phosphorus trifluoride
a)
P3F
b)
PF
c)
PF3
d)
P3F3
43.
Give the formula for oxygen dichloride
a)
OCl2
b)

O2Cl2

c)
OCl
d)
O2Cl
44.
Name SO2
a)
monosulfur dioxide
b)
sulfur dioxide
c)
sulfur oxide
d)

sulfur (II) oxide

45.
Metals tend to 
a)
gain electrons
b)
lose electrons

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