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CHEM: Covalent Bonding

Total questions: 53

Worksheet time: 43mins

Name
Class
Date
1.
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
2.
What region of the periodic table contains atoms that form covalent bonds?
a)
the left side
b)
the middle
c)
the right side
d)
top left
3.
Is carbon considered a metal or a non-metal?
a)
metal
b)
nonmetal
c)
other
4.
Are the atoms more stable when they are bonded together or when they are apart? 
a)
Bonded Together
b)
Apart
5.
What molecule is this?
a)
CO
b)
CO2
c)
C2O
d)
C2O2
6.
How many valence electrons does nitrogen have?
a)
3
b)
2
c)
5
d)
1
7.

What is it called if there are three-pairs of electrons being shared?

a)

Triple Bond

b)

Three Single Bonds

c)

Tribond

d)

Double and Single Bond Combo

8.

Which of the following is the best representation of a molecule of fluorine (F2)?

a)

A

b)

B

c)

C

d)

D

9.

Carbon is in 4A, so how many bonds can it form based on electrons needed to fill its outer shell?

a)

1

b)

3

c)

4

d)

5

10.
How many electrons are shared in a double bond?
a)
2
b)
4
c)
6
d)
8
11.

What bond is formed between a metal and a nonmetal?

a)

Covalent bond

b)

Ionic bond

c)

Hydrogen bond

d)

Metallic bond

12.

When two nonmetals do not share electrons evenly, the resulting covalent bond will be

a)

nonpolar

b)

polar

c)

ionic

d)

metallic

13.

Since covalent compounds do not have free charges, they are

a)

good conductors

b)

poor conductors

c)

ionic

d)

metallic

14.

Which would be the only situation where valence electrons would be shared evenly?

a)

metals and nonmetals

b)

different nonmetals

c)

nonmetals of the same element

d)

metalloids of the same element

15.

Which formula is for phosphorus trichloride?

a)

KCl3

b)

PCl3

c)

K3Cl

d)

P3Cl

16.

Silicon dioxide is the compound in sand. What is its formula?

a)

SO2

b)

NaO2

c)

SiO2

d)

SiO

17.
Which of the following is NOT an ionic compound:
a)
CaO
b)
NaOH
c)
BaCl2
d)
Br2
18.
What is the charge of a sodium ion with 11 protons and 10 electrons?
a)
1+
b)
1-
c)
2+
d)
2-
19.
If an atom of nitrogen gains 3 electrons, what is its overall charge?
a)
Neutral - No charge
b)
+3
c)
-3
d)
-1
20.

How many electrons make a full outer shell in the 2nd or 3rd shells?

a)

1

b)

2

c)

4

d)

8

21.

Which of these is not a covalent molecule?

a)

MgO

b)

CO2

c)

HCl

d)

CH4

22.

Carbon has 4 electrons in it's outer shell. How many covalent bonds does it need to make to complete it's outer shell electrons?

a)

1

b)

2

c)

3

d)

4

23.

How many ATOMS are in one molecule of CH4?

a)

2

b)

4

c)

5

d)

3

24.

Why is this diagram of bonding in carbon dioxide (CO2) incorrect?

a)

There should be 2 carbon atoms and one oxygen

b)

2 more electrons should be added to the carbon atom

c)

there should be a double bond not a single bond

d)

2 more electrons should be added to the oxygen atoms

25.

What is the correct formula for this molecule?

a)

CH

b)

C1H4

c)

CH4

d)

C4H

26.
The desire for an element to have 8 atoms around it is called 
a)
Octet Rule
b)
Resonance
c)
Ionization energy
d)
Electronegativity
27.
How many Valence Electrons are on Oxygen
a)
2
b)
7
c)
6
d)
1
28.
What is the formula for this Compound
a)
PCl
b)
PCL5
c)
PCl5
d)
Phosphorous Penta Chloride
29.
A polar bond is one that
a)
Has an electronegativity difference greater than 0.7
b)
Has an electronegativity difference greater than 0.5
c)
Has an electronegativity difference less that 0.5
d)
Has an electronegativity difference less than 0.7
30.
Which of these forces applies to all molecules
a)
London Dispersion
b)
Dipole dipole
c)
Hydrogen Bonding
d)
Covalent bonding
31.
Which of these would be covalently bonded
a)
Fr and K
b)
Sc and O 
c)
F and Cl
d)
He and Pt
32.
Which of the following is the correct Lewis structure for CH2O?
a)
Option A
b)
Option B
c)
Option C
d)
Option D
33.

What is the correct Lewis Dot Structure for NH3?

a)
b)
c)
d)
34.

Which is the correct molecular structure for carbon dioxide CO2?

a)
b)
c)
d)
35.

H2O has how many lone pairs?

a)

0

b)

1

c)

2

d)

3

36.

The chemical name of P₄S₁₀ is:

a)

phosphorous sulfide

b)

phosphorus sulfide

c)

tetraphosphorus decasulfide

d)

phosphorus (X) sulfide

37.

The chemical name of SO₃ is:

a)

sulfate

b)

sulfur oxide

c)

sulfur trioxide

d)

monosulfur trioxide

38.

The chemical formula of dinitrogen tetroxide is:

a)

Ni₂O₄

b)

NiO

c)

N₂O₄

d)

NiO₂

39.

Identify the following compound as ionic or covalent: CF4

a)

ionic

b)

covalent

40.

Identify the following compound as ionic or covalent: SO2

a)

ionic

b)

covalent

41.

Identify the following compound as ionic or covalent: Ca(OH)2

a)

ionic

b)

covalent

42.

Nonmetals on the right side of the periodic table have ____ ionization energies.

a)

low

b)

weak

c)

high

d)

strong

43.

What holds the atoms together in a covalent bond?

a)

The attractions between the protons and neutrons.

b)

Attractions between the shared protons.

c)

Attractions between the shared electrons and protons.

d)

Ionic valence electron transfer.

44.

A covalent bond in which electrons are not shared equally is called a(n)

a)

polar covalent bond.

b)

metallic covalent bond.

c)

ionic bond.

d)

unequal bond.

45.

When atoms form polar covalent bonds, atoms with the greater attraction for electrons has a(n)

a)

slight positive charge.

b)

slight negative charge.

c)

neutral charge.

d)

opposite charge.

46.

Correct diagram for CF4

a)
b)
c)
47.

Correct diagram for  N2N_2  

a)
b)
c)
d)
48.

Correct diagram for CO2CO_2  

a)
b)
c)
49.

Correct diagram for SCN-

a)
b)
c)
d)
50.

Correct diagram for O2

a)
b)
c)
d)
e)
51.
How many valence electrons are found in atoms of group 1?
a)
7
b)
6
c)
4
d)
1
52.
How many valence electrons are found in atoms of group 14?
a)
4
b)
3
c)
14
d)
16
53.
In a stable atom the amount of electrons is electron is equal to
a)
neutrons
b)
protons
c)
atomic mass
d)
neutrons + protons

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