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Unit 3 Review 1 Compounds and Bonding

Total questions: 32

Worksheet time: 1hrs 4mins

Name
Class
Date
1.

A covalent bond forms when atoms ___________ electrons.

a)

gain

b)

share

c)

increase

d)

transfer

2.

Which type of bond has a transfer of an electron from one atom to another?

a)

Polar Covalent

b)

Non Polar Covalent

c)

Ionic

d)

Metallic

3.

Why do atoms form bonds?

a)

They typically don't bond

b)

To add or take away energy levels

c)

To have a full valence shell.

d)

To have a full inner shell

4.

Ionic bonding occurs between a

a)

nonmetal and nonmetal

b)

metal and nonmetal

c)

metal and metal

d)

Depends on the situation

5.

Predict the bond between Mg and Cl

a)

covalent

b)

ionic

c)

metallic

d)

none of the above

6.

Groups of atoms held together by covalent bonds are called:

a)

elements

b)

molecules

c)

mixtures

d)

alloys

7.

What is the formula for the compound formed by

Cr3+ and O2- ?

a)

CrO

b)

Cr3O2

c)

Cr2O3

d)

CrO3

8.
Which of the following is NOT an ionic compound:
a)
CaO
b)
NaOH
c)
BaCl2
d)
Br2
9.

What is the correct formula for the compound lithium oxide?

a)

LiO

b)

Li2O

c)

LiO2

d)

Li2O2

10.

What is the formula for the compound formed by

Na1+ and F1- ?

a)

NaF

b)

NaF3

c)

Na3F

d)

Na1F2

11.

The chemical formula for the compound formed by Al3+ and l- is

a)

Al l3

b)

Al3l

c)

Al l

d)

Al3 l3

12.
How many elements make up this compound?
a)
6
b)
4
c)
2
d)
3
13.

Is this compound Ionic or Covalent: Ca3(PO4)2

a)

ionic

b)

covalent

14.

All of the following are properties of a metallic substance, except for __

a)

Conducts electrity

b)

Does not dissolve in water

c)

Brittle and easy to break

d)

Made entirely of metal atoms

15.
Which element can combine with oxygen to form a molecular compound?
a)
Fe
b)
Mg
c)
C
d)
Ne
16.
Metallic bonds join...
a)
Metals to nonmetals
b)
Metals to metals
c)
Metals to metalloids
d)
Metalloids to nonmetals
17.

Identify the types of bonds shown in the image.

a)

A. Covalent , B. Ionic, C. Metallic

b)

A. Covalent , B. Metallic, C. Ionic

c)

A. Ionic , B. Covalent, C. Metallic

d)

A. Ionic , B. Metallic, C. Covalent

18.

In this type of bond, electrons are free to move around positively charged cations (the "sea of electrons" model).

a)

Ionic

b)

Covalent

c)

Metallic

d)

Nonpolar

19.

What type of chemical bond is found in NO2?

a)

Covalent

b)

Ionic

c)

Metallic

d)

Both Covalent and Ionic

20.

What type of chemical bond is found in stainless steel, a metal alloy?

a)

Covalent

b)

Ionic

c)

Metallic

d)

Both Covalent and Ionic

21.

Which of the following is a characteristic property of ionic compounds?

a)

They form crystalline solids and have low melting points.

b)

Form solids and gases at room temperature.

c)

They form hard crystals with high melting points.

d)

They are generally gases with extremely high boiling points.

22.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
23.
Which of the following is a compound?
a)
Co
b)
O2
c)
C
d)
CO2
24.

How many TOTAL atoms are there in H2SO4?

a)

6

b)

5

c)

7

d)

3

25.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
26.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
27.

How many Chlorine atoms are in MgCl2?

a)

2

b)

1

c)

3

28.
Number of H in 3(NH₄)₂CrO₄
a)
4
b)
2
c)
8
d)
24
29.
Which of the following statements is true about the molecule below?
2NaC2H3O2
a)
There are 3 Nitrogen atoms
b)
There are 2 Carbon atoms
c)
There are 6 Hydrogen atoms
d)
There are 2 Oxygen atoms
30.
Which of the following statements is true about the molecule below?
4NH4C2H3O2
a)
There are 48 total atoms
b)
There are 5 total elements
c)
There are 7 Hydrogen atoms
d)
There are 12 total atoms in this molecule
31.
Number of Cr atoms in (NH₄)₂Cr₂O₇
a)
2
b)
6
c)
8
d)
56
32.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16

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