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Unit 3 Test Review

Total questions: 78

Worksheet time: 4hrs 54mins

Name
Class
Date
1.

What is the atomic structure of an atom?

a)

The atomic structure of an atom consists of only protons and neutrons, with no electrons.

b)

The atomic structure of an atom consists of a nucleus, which contains electrons, surrounded by protons and neutrons.

c)

The atomic structure of an atom consists of a nucleus, which contains electrons, surrounded by neutrons and protons.

d)

The atomic structure of an atom consists of a nucleus, which contains protons and neutrons, surrounded by electrons in energy levels or shells.

2.

How many electrons can the first energy level hold?

a)

6

b)

4

c)

8

d)

2

3.

What is the electron configuration of oxygen?

a)

1s2 2s2 2p2

b)

1s2 2s2 2p6

c)

1s2 2s2 2p3

d)

1s2 2s2 2p4

4.

What is the electron configuration of sodium?

a)

1s2 2s2 2p6 3s2

b)

1s2 2s2 2p6 3s2 3p1

c)

1s2 2s2 2p6 3s2 3p6

d)

1s2 2s2 2p6 3s1

5.

What is the process of ionic bonding?

a)

Ionic bonding is the process of sharing electrons between atoms to form ions.

b)

Ionic bonding is the process of repelling electrons between atoms to form ions.

c)

Ionic bonding is the process of converting atoms into ions without any electron transfer.

d)

Ionic bonding is the process of transferring electrons between atoms to form ions, which are then attracted to each other due to their opposite charges.

6.

What is the difference between ionic and covalent bonding?

a)

Ionic bonding involves the formation of molecules, while covalent bonding involves the formation of ions.

b)

Ionic bonding involves the attraction between two atoms, while covalent bonding involves the repulsion between two atoms.

c)

Ionic bonding involves the transfer of electrons, while covalent bonding involves the sharing of electrons.

d)

Ionic bonding involves the sharing of electrons, while covalent bonding involves the transfer of electrons.

7.

What is the charge of an ion formed by gaining electrons?

a)

-

b)

++

c)

0

d)

+

8.

What is the charge of an ion formed by losing electrons?

a)

+1

b)

+2

c)

0

d)

-1

9.

What is the formula for sodium chloride?

a)

NaCl

b)

C6H12O6

c)

CO2

d)

H2O

10.

What is the formula for magnesium oxide?

a)

Mg(OH)2

b)

MgO

c)

MgO2

d)

Mg2O

11.

What is the atomic number of carbon?

a)

6

b)

8

c)

12

d)

16

12.

What is the formula for water?

a)

H2O

b)

CO2

c)

NaCl

d)

C6H12O6

13.

What is the electron configuration of carbon?

a)

1s2 2s2 2p2

b)

1s2 2s2 2p6

c)

1s2 2s2 2p3

d)

1s2 2s2 2p4

14.
Beryllium will ____ valence electrons when forming an ionic bond.
a)
lose 4
b)
gain 4
c)
lose 2
d)
gain 2
15.
In the chemical formula for an ionic compound, which item is written first?
a)
positive ion
b)
negative ion
c)
subscript
d)
the female
16.
Which is the correct name for CaBr2?
a)
Calcium Bromine
b)
Bromine Calcium
c)
Calcium Bromide
d)
Carbon and Bromine
17.

Which of the following is true for ionic bonding & ionic compounds?

a)

They must be made of ions with like charges.

b)

The negative ion must be written first.

c)

Compounds must have an overall charge of zero.

d)

They are made of metals and nonmetals.

e)

The positive ion must be written first.

18.

Which of these is the correct match to form an ionic compound?

a)
b)
c)
19.
A cation is a ____ ion.
a)
negative
b)
positive
c)
neutral
d)
ficticious
20.
A anion will be a ____ ion.
a)
negative
b)
positive
c)
neutral
d)
ficticious
21.

Which of these is the correct match to form an ionic compound?

a)
b)
c)
22.
Ionic bonds form between metals and ____.
a)
metalloids
b)
metals
c)
nonmetals
23.

Which of these is the correct match to form an ionic compound?

a)
b)
c)
d)
24.

Which of these is the correct match to form an ionic compound?

a)
b)
c)
d)
25.
What type of bond is this? Lithium with Fluorine?
a)
ionic
b)
covalent
26.

What atom matches this electron configuration?

1s22s22p63s23p64s23d10

a)

zinc

b)

copper

c)

nickel

d)

germanium

27.
What electron configuration matches an oxygen atom?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
28.
This orbital diagram represents:  
a)
C
b)
B
c)
N
d)
O
29.
How many electrons can the d sublevel hold?
a)
14
b)
10
c)
2
d)
6
30.

What is the short hand configuration for silicon?

a)

[Ar]2s22p2

b)

[Ne]2s22p2

c)

[Ne]3s23p2

d)

[Ne]3s23p4

31.

What is the short hand configuration for iodine?

a)

[Ar]4s23d6

b)

[Ne]4s23d6

c)

[Kr]5s24d105p5

d)

[Kr]4s24d104p5

32.

With what neutral element is Ag+ isoelectronic?

a)

Cd

b)

Pd

c)

Xe

d)

Kr

33.

Which is the correct orbital notation for nitrogen (atomic # = 7)

a)
b)
c)
d)
34.

Which rule is described as opposite and paired?

a)

Aufbau

b)

Pauli

c)

Hund's

35.

Which rule is violated in this orbital diagram?

a)

Aufbau

b)

Pauli

c)

Hund's

36.

Which rule is violated in this orbital diagram?

a)

Aufbau

b)

Pauli

c)

Hund's

37.
In covalent bonds, electrons are ___________.
a)
transferred
b)
gained
c)
lost
d)
shared
38.
What geometry will this molecular structure have?: H2S
a)
bent
b)
tetrahedral
c)
linear
d)
trigonal pyramidal
39.
This is a correct dot diagram for fluorine (F)
a)
true
b)
false
40.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Tetrahedral
d)
Linear
41.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Bent
d)
Linear
42.
Choose the correct shape for this molecule:
a)
Bent
b)
Trigonal pyramidal
c)
Trigonal planar
d)
Linear
43.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
44.
Choose the correct shape for this molecule:
a)
linear
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
45.

What is the correct shape of CHCl3?

a)

Bent

b)

Trigonal pyramidal

c)

Tetrahedral

d)

Trigonal planar

46.
Choose the correct shape for this molecule:
a)
Bent
b)
Linear
c)
Tetrahedral
d)
Trigonal pyramidal
47.
*
a)
linear
b)
trigonal planar
c)
trigonal pyramid
d)
bent of angular
48.
What is the VSEPR theory used to predict?
a)
Bond Strength
b)
Polarity
c)
Molecular Shape
d)
Electronegativity
49.
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
50.

What is the oxidation state of phosphorous in Mg3(PO4)2

a)

+2

b)

+3

c)

+4

d)

+5

51.

What is the oxidation number for O2

a)

-2

b)

-1

c)

0

d)

+2

52.

What is the oxidation state of vanadium in V(H2O)63+

a)

1+

b)

3+

c)

5+

d)

7+

53.

Why do atoms bond?

a)

They typically don't bond

b)

To add or take away energy levels

c)

To have a full valance shell.

d)

To have a full inner shell

54.

Why do atoms bond?

a)

They typically don't bond

b)

To add or take away energy levels

c)

To have a full valance shell.

d)

To have a full inner shell

55.

Which bond does this picture best represent?

a)

Metallic bond

b)

ionic bond

c)

covalent bond

d)

James Bond

56.

What do positive ions tend to do?

a)

lose electrons

b)

gain electrons

c)

lose protons

d)

gain protons

57.

What happens when magnesium loses 2 electrons?

a)

It stabilizes to a net charge of 0

b)

It turns into an atom

c)

It becomes negatively charged

d)

It becomes positively charged

58.

Ionic Bonding involves:

a)

The transfer of protons

b)

The transfer of neutrons

c)

The transfer of electrons

d)

None Of the above

59.

Covalent compounds:

a)

Share electrons

b)

Transfer electrons

c)

Neither

60.

What is a valence electron?

a)

an electron that is found in the outermost shell of an atom.

b)

an electron found in the innermost shell of an atom.

c)

an electron found in the middle shell.

61.

What is the number of valence electrons for Neon and the other Noble Gases?

a)

5

b)

6

c)

7

d)

8

62.

If an atom transfers an electron to another atom, those atoms form which bond?

a)

Ionic Bond, which is stronger than a covalent bonds

b)

Covalent Bond, which is stronger than ionic bonds

63.
In chemical compounds, covalent bonds form when
a)
the electronegativity difference between two atoms is very large.
b)
electrons are completely transferred between two metals.
c)
pairs of electrons are shared between two nonmetal atoms.
d)
two nonmetal atoms are attracted to each other by opposite charges.
64.
How many electrons does Si contain? (click to see image)
a)
14
b)
28
c)
2
d)
4
65.

Typically, atoms are more stable when they are

a)

bonded together

b)

apart from each other

66.
What are the electrons in the outer most level called?
a)
Outer level electrons
b)
Protons
c)
Neutrons
d)
Valence Electrons
67.
Chemical bonds form when atoms
a)
combined nuclei
b)
give up neutrons
c)
gain protons
d)
share or transfer electrons
68.
Covalent compounds
a)
Share electrons
b)
transfer electrons
c)
contain a sea of electrons
d)
conduct electricity
69.

Which statement correctly describes what happens to Li and Cl atoms when they bond?

a)

Li loses 1 valence electron and becomes a positive ion, Cl gains 1 valence electron and becomes a negative ion.

b)

Li gains 1 valence electron and becomes a positive ion, Cl loses 1 valence electron and becomes a negative ion.

c)

Li gains 1 valence electron and becomes a negative ion, Cl loses 1 valence electron and becomes a positive ion.

d)

Li loses 1 valence electron and becomes a negative ion, Cl gains 1 valence electron and becomes a positive ion.

70.

What is the molecular shape of this compound?

a)

Trigonal Planar

b)

Tetrahedral

c)

Linear

71.

Which of the following is an example of a COVALENT COMPOUND?

a)

MgO

b)

Kl

c)

CaCl2

d)

H2S

72.

Match the Oxidation Number to the correct element.

a)

Ca

1.

+2

b)

Br

2.

-1

c)

O

3.

-2

d)

Na

4.

+1

e)

Al

5.

+3

73.

Which element would be in group 2?

a)

V

b)

W

c)

X

d)

Y

e)

Z

74.
What is the mass number of this atom?
a)
1
b)
3
c)
4
d)
7
75.

Which is a CORRECT electron dot diagram for Beryllium?

a)
b)
76.

USE THE PERIODIC TABLE

How many dots would an electron dot diagram for Calcium (Ca) have?

(Click on image to enlarge it or use your own periodic table.)

a)

20

b)

2

c)

40

d)

4

77.
Which is the correct structure for ammonia?
(Top picture is A, bottom picture is D.)
a)
Option A
b)
Option B
c)
Option C
d)
Option D
78.

Which of these is in group 2?

a)
b)
c)
d)

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