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Chemical Bonding Bio/Chem

Total questions: 76

Worksheet time: 2hrs 48mins

Name
Class
Date
1.
When an atom loses a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
2.
When an atom gains a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
3.
If an element has 3 valence electrons, what charge will likely form on its ion ?  Hint:  It will lose those electrons.  What happens to the charge when it loses 3 electrons?
a)
+3
b)
+5
c)
-3
d)
-5
4.
Nitrogen will ____ valence electrons when forming an ionic bond.
a)
gain 1
b)
lose 1
c)
gain 3
d)
lose 3
5.
Ionic bonds form between two ions that have 
a)
ionic compounds
b)
negative charges
c)
positive charges
d)
opposite charges 
6.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
7.
This is a correct dot diagram for nitrogen (N)
a)
true
b)
false
8.
Group 17 always has ions with a charge of 
a)
+1
b)
+2
c)
-1
d)
-2
9.
Beryllium will ____ valence electrons when forming an ionic bond.
a)
lose 4
b)
gain 4
c)
lose 2
d)
gain 2
10.
Magnesium bromide is an ionic compound with the chemical formula MgBr₂.  What does the "2" tell you?
a)
There are 2 bromide ions for every magnesium ion
b)
Bromide has a 2- charge
c)
Bromide has a 2+ charge
d)
There are 2 magnesium ions to every bromide ion
11.
Metals tend to 
a)
gain electrons
b)
lose electrons
12.
When metals bond with non-metals they form what type of bonds
a)
covalent
b)
ionic
c)
cooperative
d)
lewis
13.
An ion with a negative charge is a/an
a)
anion
b)
cation
14.

What are the seven diatomic elements?

a)

H2, Cl2, Br2, O2, N2, I2, F2

b)

H2, Cl2, I2, F2, Hg2, Br2, Fe2

c)

H2, Cu2, Ni2, B2, O2, I2, Fe2

15.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
16.

Hydrogen needs _____ valence electrons, rather than 8, to be stable.

a)

4

b)

6

c)

8

d)

2

17.
If electrons are shared unequally then the bond is....
a)
Non-polar covalent
b)
Ionic
c)
Non-polar ionic
d)
Polar covalent
18.
If electrons are shared equally then the bond is....
a)
Non-polar covalent
b)
Ionic
c)
Non-polar ionic
d)
Polar covalent
19.
Three pairs of electrons are shared in a
a)
Single bond
b)
Double bond
c)
Triple bond
20.

Each line drawn in a Lewis Structure represents __________ electron(s).

a)

3

b)

2

c)

1

d)

4

21.

A molecule of SO2 (AB2E1) has what shape?

a)

Linear

b)

Tetrahedral

c)

Bent

d)

Triangular

22.
A molecule of methane has what shape?
a)
Tetrahedral
b)
Triangular
c)
Pyramidal
d)
Octahedral
23.
The theory that is used to predict the arrangement of atoms about a central atom is called?
a)
Valence shell repulsion
b)
Valence shell electron sharing
c)
Valence shell electron pair repulsion
d)
Valence electron shell repulsion pair
24.
Atoms of H only form _________ bonds.
a)
Double
b)
Single
c)
Multiple
d)
Triple
25.

By replacing the element symbol, this could be a diagram of which element?

a)

Li

b)

Al

c)

C

d)

Be

26.
Choose the correct shape for this molecule:
a)
Bent
b)
Trigonal pyramidal
c)
Trigonal planar
d)
Linear
27.
Choose the correct shape for this molecule:
a)
linear
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
28.
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
29.

The geometry of a molecule with 2 bonded pairs of electrons and 2 lone pairs of electrons, AB2E2

a)

Tetrahedral

b)

Trigonal Planar

c)

Bent

d)

Trigonal Pyramidal

e)

Linear

30.
 A lone pair is defined as
a)

A pair of bonding electrons

b)

One non-bonding electron

c)

A pair of unshared electrons

d)

A pair of electrons on the central atom

31.
In covalent bonds, electrons are ___________.
a)
transferred
b)
gained
c)
lost
d)
shared
32.
This is a correct dot diagram for oxygen (O)
a)
true
b)
false
33.

Are the bonds in a water molecule polar or non-polar?

a)

Polar

b)

Non-polar

34.
This is an example of a __________ bond.
a)
non-polar covalent
b)
polar covalent
c)
ionic
d)
metallic
35.
What geometry will this molecular structure have?: PH3
a)

bent

b)

tetrahedral

c)

linear

d)

pyramidal

36.

What is the molecules molecular geometry name?

a)

Linear

b)

Bent

c)

Trigonal Pyramidal

d)

Trigonal Planar

37.

The polarity of a bond is determined by...

a)

The sum of the electronegativities of the two atoms

b)

The difference in the electronegativities of the two atoms

c)

The charges of the atoms

d)

None of the Above

38.

What must the difference in electronegativity between two atoms be in order for the bond between them to be nonpolar covalent?

a)

less than or equal to 0.4

b)

greater than 1.99

c)

between 0.4 and 1.99

d)

exactly 0

39.

A diatomic molecule like O2 is always _____ because electrons are shared _____

a)

nonpolar; unequally

b)

polar; equally

c)

nonpolar; equally

d)

polar; unequally

40.
Which molecule contains bonds with a GREATER polarity?
a)
HCl
b)
CCl4
41.
The electronegativity difference in the bonds of CCl4 (carbon tetrachloride) is:
a)
0.4
b)

0.6

c)

0.8

d)

1.0

42.

Atoms from family IIA on the Periodic Table are likely to form ions of what charge?

a)

+1

b)

+2

c)

0

d)

−1

e)

−2

43.

Atoms from family VIA on the Periodic Table are likely to form ions of what charge?

a)

+1

b)

+2

c)

0

d)

−1

e)

−2

44.

What is the formula of an ionic compound formed from Lithium and Oxygen?

a)

Li2O

b)

LiO2

c)

2LiO

d)

Li2O

45.
Nitrogen will form which of the following ions?
a)
N
b)
N-3
c)
N-5
d)
N+5
46.

What is the charge of a sodium ion?

a)

+2

b)

+1

c)

-1

d)

-2

47.
What charge will an Oxygen ion have? 
a)
+1
b)
-1
c)
+2
d)
-2
48.
Which of the following has a -3 charge?
a)
Boron
b)
Fluorine
c)
Nitrogen
d)
Neon
49.
charge of beryllium ion
a)
-2
b)
-1
c)
+1
d)
+2
50.
Which of the following has a -1 charge? 
a)
Aluminum
b)
Bromine
c)
Calcium
d)
Potassium
51.
Elements on the LEFT side of the periodic table will most likely form:
a)
Positive ions
b)
Negative ions
c)
Neutral Ions
d)
None of these
52.
What is the ionic symbol for a Caesium atom?
a)
Cs+
b)
Cs-
c)
Cs+2
d)
Cs-2
53.
What geometry will this molecular structure have?: H2S
a)
bent
b)
tetrahedral
c)
linear
d)
trigonal pyramidal
54.
This is a correct dot diagram for fluorine (F)
a)
true
b)
false
55.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
56.
Choose the correct shape for this molecule:
a)
linear
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
57.

What is the correct shape of CHCl3?

a)

Bent

b)

Trigonal pyramidal

c)

Tetrahedral

d)

Trigonal planar

58.
Choose the correct shape for this molecule:
a)
Bent
b)
Linear
c)
Tetrahedral
d)
Trigonal pyramidal
59.
This could be the dot diagram of
a)
P
b)
Ar
c)
Na
d)
B
60.
This could be the dot diagram of 
a)
Ne
b)
Si
c)
Al
d)
Be
61.

Which atom has the LOWER electronegativity?

a)

Na

b)

Li

62.

What type of bond is formed as a result of the transfer of electrons?

a)

covalent

b)

metallic

c)

ionic

d)

intermolecular

63.

Which has a higher electronegativity

a)

Carbon

b)

Nitrogen

c)

Fluorine

d)

Calcium

64.

What are the two types of polarities

a)

Ionic & Covalent

b)

Solubility & Miscibility

c)

North & South

d)

Polar & Nonpolar

65.

Which element has the least amount of electronegativity?

a)

Potassium

b)

Lithium

c)

Bromine

d)

Calcium

66.
What is the VSEPR theory used to predict?
a)
Bond Strength
b)
Polarity
c)
Molecular Shape
d)
Electronegativity
67.

The geometry of a molecule with 2 bonded pairs of electrons and 2 lone pairs of electrons, AB2E2

a)

Tetrahedral

b)

Trigonal Planar

c)

Bent

d)

Trigonal Pyramidal

e)

Linear

68.

AB3 is a symbol for molecular shape __________________

a)

Tetrahedral

b)

Linear

c)

Trigonal planar

d)

Pyramidal

69.

The general formula for TETRAHEDRAL shape is __________

a)

AB2

b)

AB3

c)

AB4

d)

AB

70.

Is O2 a diatomic element?

a)

Yes

b)

No

71.

Is K2 a diatomic element?

a)

Yes

b)

No

72.

Is the following compound ionic or covalent?

LiBr

a)

Ionic

b)

Molecular

73.

Compounds composed of a ______________ and _____________ like the compound CaCl2 , are ionic compounds.

a)

metal ... metal

b)

nonmetal ... nonmetal

c)

metal ... nonmetal

74.
Which following is a molecular compound?
a)
SO2
b)
K2O
c)
CaO
d)
BeO
75.

Fe2(CO3)3

a)

ionic compound

b)

molecular compound

c)

diatomic molecule

d)

acid

76.
Which of the following is a molecular compound?
a)
CaO
b)
NaCl
c)
CaCl2
d)
CH4

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