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Practice: Trends & Lewis Structures

Total questions: 45

Worksheet time: 2hrs 40mins

Name
Class
Date
1.
This is a correct dot diagram for oxygen (O)
a)
true
b)
false
2.
This is the correct dot diagram for nitrogen (N)
a)
true
b)
false
3.
This could be the dot diagram of
a)
Mg
b)
Cl
c)
C
d)
O
4.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
5.
Hydrogen needs _____ electrons in its valence shell to be stable.
a)
4
b)
6
c)
8
d)
2
6.
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
a)
A
b)
B
c)
C
d)
D
7.
What is the correct structure for BF3?
a)
Option A.
b)
Option B. 
c)
Option C.
d)
Option D.
8.
How many electrons can be used in the Lewis Structure for : NO3 -
a)
23
b)
20
c)
18
d)
24
9.
How many valence electrons are available for bonding in the sulfate ion (SO4-2)?
a)
30 electrons
b)
32 electrons
c)
28 electrons
d)
impossible to tell
10.
How many valence electrons are in Phosphorus?
a)
15
b)
4
c)
5
d)
31
11.
Which of the following is the correct Lewis structure for the compound PBr3?
a)
structure A
b)
structure B
c)
structure C
d)
structure D
12.
In the correct Lewis structure for CH4, how many unshared electron pairs surround the carbon?
a)
2
b)
8
c)
0
d)
4
13.
In CO2, how many UNSHARED pairs of electrons does each oxygen have?
a)
2
b)
1
c)
4
d)
6
14.

What is the correct Lewis Dot Structure for ammonia NH3

a)
b)
c)
d)
15.

Which is the correct molecular structure for carbon dioxide?

a)
b)
c)
d)
16.

How many total valence electrons are participating in bonding in the molecule above?

a)

8

b)

4

c)

2

d)

3

17.
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
a)
A
b)
B
c)
C
d)
D
18.

NH3 has how many lone pairs?

a)

0

b)

1

c)

2

d)

3

19.

CCl4 has how many double bonds?

a)

0

b)

1

c)

2

d)

3

20.

In HCN (Carbon is usually the central atom) what kind of bond is between the C and N

a)

Single

b)

Double

c)

Triple

21.

CHCl3 has how many double bonds?

a)

0

b)

1

c)

2

d)

3

22.

CH2O has which of the following?

a)

Multiple double bonds

b)

Multiple single bonds

c)

One double bond

d)

One single bond

e)

A lone pair

23.
A molecule of methane has what shape?
a)
Tetrahedral
b)
Triangular
c)
Pyramidal
d)
Octahedral
24.
Traveling down a family the atomic radii ______________.
a)
Increases
b)
Decreases
c)
Stays the same
25.
Traveling across a period the atomic radii ______________.
a)
Increases
b)
Decreases
c)
Stays the same
26.
How does ionization energy change as I go across a period ?
a)
It doesn't
b)
It increases
c)
It decreases
27.
How does ionization energy change as I go down a family?
a)
It doesn't
b)
It increases
c)
It decreases
28.
Ionization Energy is defined as.....
a)
The smallest amount of energy possible to excite an electron to a higher energy level
b)
The amount of energy given off when an electron returns to a ground state
c)
The amount of energy in one photon
d)
The energy required to remove one electron from a neutral atom
29.
Which element has the greatest ionization energy: Aluminum (Al)    or    Chlorine (Cl)?
a)
Aluminum (Al)
b)
Chlorine (Cl)
30.
Which element has the greatest electronegativity: Nitrogen (N) or Arsenic (As)?
a)
Nitrogen (N)
b)
Arsenic (As)
31.

Which element in Period 2 has the greatest atomic radius?

a)

Be

b)

C

c)

Na

d)

Li

32.

Which of the group 13 elements is the largest?

a)

B

b)

Ti

c)

Fr

d)

Ga

33.

Of the halogens, which has the smallest radius?

a)

F

b)

Br

c)

He

d)

At

34.

Of the halogens, which has the smallest electronegativity?

a)

F

b)

Cl

c)

At

d)

Ne

35.

Which of the alkaline-earth metals has the smallest electronegativity

a)

Be

b)

Sc

c)

Ra

d)

Sr

36.

Which of the period 3 elements has the largest electronegativity?

a)

Ar

b)

Cl

c)

Na

d)

F

37.
Which has the greater EN: 
Cl or Al?
a)
Cl
b)
Al
38.
Which has the greater EN: 
N or C?
a)
C
b)
N
39.
Which has the greater EN: 
H or F?
a)
H
b)
F
40.
Which of the following will have a larger radius than Zinc?
a)
Gallium
b)
Aluminum
c)
Magnesium
d)
Strontium
41.
Which of the following will have a higher electronegativity than arsenic (As)?
a)
Carbon (C)
b)
Neon (Ne)
c)
Antimony (Sb)
d)
Germanium (Ge)
42.
Which of the following will have a lower ionization energy than Scandium (Sc)?
a)
Helium (He)
b)
Titanium (Ti)
c)
Calcium (Ca)
d)
Magnesium (Mg)
43.

Which has the largest radius: Ca2+ or Mg? Explain.

4 lines
44.

Which would have the lower ionization energy: Br or S?

4 lines
45.

Which would have a higher electron affinity: Rb or Li?

4 lines

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