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Chemical Bonding

Total questions: 40

Worksheet time: 39mins

Name
Class
Date
1.
In a covalent bond, one or more electrons are? 
a)
shared 
b)
lost 
c)
gained 
d)
transferred 
2.
What does a sodium atom become when it loses its only valence electron?
a)
sodium compound
b)
sodium atom
c)
ionic compound
d)
sodium ion
3.
What is the charge of a sodium ion with 11 protons and 10 electrons?
a)
1+
b)
1-
c)
2+
d)
2-
4.

If an atom has no charge, which of the following must be true?

a)

It has more neutrons than protons or electrons.

b)

There are only neutrons inside the atom.

c)

Its number of protons is equal to its number of electrons.

d)

The neutrons in the atom outnumber the electrons and protons.

5.

Which of these are an ion?

a)

3 protons, 3 neutrons, 3 electrons.

b)

8 protons, 8 neutrons, 8 electrons

c)

2 protons, 3 neutrons, 2 electrons

d)

6 protons, 6 neutrons, 7 electrons

6.
If an atom of nitrogen gains 3 electrons, what is its overall charge?
a)
Neutral - No charge
b)
+3
c)
-3
d)
-1
7.
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
8.
How many valence electrons does hydrogen have?
a)
1
b)
2
c)
3
d)
4
9.
A(n) _________ is an ion with a positive (+) charge.
a)
anion
b)
cation
c)
ion
d)
solute
10.
A charged particle that has gained at least one electron is called a(n) _____.
a)
Anion
b)
Cation
c)
Anonion
d)
chemistry cat
11.
Ionic bonds form between metals and ____.
a)
metalloids
b)
metals
c)
nonmetals
12.

Which types of elements become cations?

a)

nonmetals

b)

metals

c)

only transition metals

d)

some metals and some nonmetals

13.
If an oxygen atom has 8 protons (+) and 10 electrons (-), what is it's charge?
a)
O10-
b)
O8+
c)
O2-
d)
O10+
14.
What is the basis of a metallic bond?
a)
the attraction of neutral metal atoms.
b)
the attraction between protons and neutrons.
c)
the attraction between positive metal ions and interlocking electrons.
d)
the attraction between positive metal ions and free floating electrons.
15.
How many electrons should Lithium have around its Lewis dot model?
a)
1
b)
2
c)
3
d)
4
16.
How many electrons should Carbon have around its Lewis dot model?
a)
1
b)
3
c)
4
d)
5
17.
How many electrons should Phosphorus have around its Lewis dot model?
a)
2
b)
4
c)
5
d)
7
18.
How many electrons should Argon have around its Lewis dot model?
a)
5
b)
6
c)
7
d)
8
19.

What is the correct Lewis Dot Structure for ammonia NH3

a)
b)
c)
d)
20.

This is a correct dot diagram for magnesium (Mg)

a)

true

b)

false

21.

This is a correct dot diagram for carbon (C)

a)

true

b)

false

22.

How many electrons are shared in one of these N-Cl bonds?

a)

1

b)

2

c)

3

d)

4

23.

What atom is shown in the picture?

a)

Sodium (Na)

b)

Fluorine (F)

c)

Sulfur (S)

d)

Potassium (K)

24.

What is the octet rule?

a)

All atoms want a full valence energy level.

b)

Octopuses have 8 tentacles.

c)

All atoms want to have 8 total electrons.

d)

All atoms want to have two valence electrons

25.

Is this the correct Lewis Dot Structure for Boron?

a)

Yes

b)

No, missing electrons

c)

No, too many electrons

d)

No, dots are in wrong place.

26.

Which of these is correct?

a)
b)
27.

Which of the following elements will NOT be surrounded by an octet of electrons in a correctly drawn Lewis structure?

a)

Carbon

b)

Oxygen

c)

Chlorine

d)

Hydrogen

28.
Ionic or covalent?
NaBr
a)
Ionic
b)
Covalent
29.

What is the ONLY part of the atom that makes a chemical bond

a)

Nucleus

b)

Electrons

c)

Valence Electrons

d)

Protons

30.

What is the correct formula for this molecule?

a)

NH

b)

N3H

c)

NH3

d)

NH4

31.
Which of the following is the correct Lewis structure for water?
a)
A
b)
B
c)
C
32.

Why does salt melt ice?

a)

It lowers the freezing point of water

b)

It raises the freezing point of water

c)

It cause the air temperature to rise around the ice

d)

Scientists are still trying to figure this out

33.

Do the Noble Gases form ions? Why or why not?

a)

No, because they already have a stable octet in their outer orbitals

b)

Yes, because this is something all elements do regardless of how many valence electrons they have

c)

No, because they are already ions in their natural state (no need to form ions)

d)

Yes, because all atoms need 8 valence electrons

34.

Sodium Chloride (NaCl), also known as table salt, is an excellent example of a compound.

a)

True

b)

False

35.

Atoms of which elements tend to gain electrons?

a)

Metals

b)

Nobel Gases

c)

Actinides

d)

Non-Metals

36.

Atoms of which elements tend to lose electrons?

a)

Actinides

b)

Non-Metals

c)

Metals

d)

Noble Gases

37.

What is the most important factor affecting how atoms form chemical bonds?

a)

number of protons

b)

number of neutrons

c)

Valence Electrons

d)

distance

38.

Ionic or Covalent Bond? MgCl2

a)

Covalent

b)

Ionic

c)

Metallic

d)

None of these

39.

The picture shows two hydrogen atoms that are ________________ bonded together.

a)

ionically

b)

covalently

c)

metallically

d)

asymmetrically

40.

A _________________ is two or more atoms bonded together (they don't have to be different). The oxygen we breath is a great example.

a)

gem

b)

mixture

c)

bond

d)

molecule

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