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Worksheets

Midterm Practice

Total questions: 97

Worksheet time: 6hrs 58mins

Name
Class
Date
1.

Which group is the least reactive

a)

alkali metals

b)

alkaline earth metals

c)

halogen

d)

noble gasses

2.
How many valence electrons are in an atom of Se?
a)
2
b)
8
c)
6
d)
5
3.
a)
2
b)
8
c)
3
d)
13
4.
Valence electrons are the...
a)
Innermost electrons
b)
Middle electrons
c)
Outermost electrons
d)
Any electrons
5.

USE THE PERIODIC TABLE

How many valence electrons does carbon have?

a)

4

b)

12

c)

6

d)

14

6.

USE THE PERIODIC TABLE

How many valence electrons does Phosphorus have?

a)

31

b)

5

c)

15

d)

4

7.

USE THE PERIODIC TABLE

Find the element that has 3 Valence Electrons and 2 energy levels.

a)

Magnesium - Mg

b)

Lithium - Li

c)

Aluminum - Al

d)

Boron - B

8.
Elements in the same column of the periodic table always have the same # of _______ as one another.
a)
Protons
b)
Neutrons
c)
Electrons
d)
Valence Electrons
9.

Hydrogen needs _____ electrons in its valence shell to be stable.

a)

4

b)

6

c)

8

d)

2

10.

All atoms are most stable with (or would "prefer") how many electrons in their valence shell?

a)

1

b)

2

c)

8

d)

18

11.

What groups are the most reactive metals?

a)

2 and 3

b)

1 and 18

c)

1 and 2

d)

16 and 17

12.

Why are halogens so reactive?

a)

They want to get rid of their only valance electron

b)

They only need one more electron

c)

They are non reactive, they have a full shell

13.
Which of the following elements has 18 electrons?
a)
Flourine
b)
Helium
c)
Argon
d)
Chlorine
14.

On the periodic table, Groups are

a)

Horizontal rows

b)

Vertical columns

15.

On the periodic table, Periods are

a)

Horizontal rows

b)

Vertical columns

16.
A charged particle that has gained or lost electrons is called a _____.
a)
molecule
b)
ion
c)
isotope
d)
element
17.
A cation is a ____ ion.
a)
negative
b)
positive
c)
neutral
d)
ficticious
18.
A anion will be a ____ ion.
a)
negative
b)
positive
c)
neutral
d)
ficticious
19.
Nitrogen will form which of the following ions?
a)
N
b)
N-3
c)
N-5
d)
N+5
20.
Beryllium will ____ valence electrons when forming an ionic bond.
a)
lose 4
b)
gain 4
c)
lose 2
d)
gain 2
21.
Ionic bonds form between metals and ____.
a)
metalloids
b)
metals
c)
nonmetals
22.
What type of bond is this? Lithium with Fluorine?
a)
ionic
b)
covalent
23.
Which of the following would produce an anion?
a)
Ca
b)
Al
c)
K
d)
F
24.
Which of the following will form an ion with a 2- charge?
a)
Ca
b)
Se
c)
Ge
d)
N
25.
The atomic number is equal to _.
a)

the number of protons

b)
the number of neutrons only
c)
the total number of protons and neutrons
d)
the number of protons neutrons and electrons
26.

In a neutral atom, the number of protons is the same as..

a)

the number of neutrons

b)

the number of electrons

c)

the atomic mass

d)

the mass number

27.
The atomic mass is equal to _.
a)
the number of protons only
b)
the number of neutrons only
c)
the total number of protons and neutrons
d)
the number of protons, neutrons, and electrons.
28.
What is the atomic number of Fe? (click to see image)
a)
26
b)
55.845
c)
56
d)

55

e)

81

29.

What charge does an atom have when it GAINS electrons?

a)

Positive

b)

Negative

c)

Neutral

d)

atoms don't gain electrons, they only lose them

e)

no charge

30.

How many total electrons does a magnesium ion have?

a)

24

b)

12

c)

10

d)

14

31.

What is the name of this compound? Al2N3

(a)  

32.
K20 - name?
a)
potassium dioxide
b)
potassium oxide
c)
potassium oxygen
d)
dipotassium dioxide
33.

What is the name for AlBr3?

a)

aluminum bromide

b)

aluminum tribromide

c)

aluminum bromine

d)

monoaluminum tribromide

34.

How many Oxygen atoms are in H2O?

a)

1

b)

2

c)

0

d)

4

35.
Name this compound:
Cs2S
a)
cesium sulfide
b)
cesium sulfate
c)
cesium II sulfate
d)
cesium II sulfide
36.

USE THE PERIODIC TABLE

How many valence electrons does sodium have?

a)

1

b)

2

c)

3

d)

4

37.

USE THE PERIODIC TABLE

How many valence electrons does carbon have?

a)

4

b)

12

c)

6

d)

14

38.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
39.
An atom becomes _______ when it loses electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
40.

What is a Rubidium ION's symbol?

a)
Rb-
b)
Rb+
c)
Rb-2
d)
Rb+2
41.
Which of the following is NOT formed by a covalent bond?
a)
K2S
b)
H2O
c)
I2
d)
CO2
42.

This is a correct dot diagram for carbon (C)

a)

true

b)

false

43.

This is a correct dot diagram for neon (Ne)

a)

true

b)

false

44.
Name the following ionic compound: NaF
a)
nitrogen fluorine
b)
sodium fluoride
c)
nitrogen fluoride
d)
sodium fluorine
45.
Name the following ionic compound: BeCl2
a)
beryllium chlorine
b)
beryllium (II) chloride
c)
beryllium chloride
d)
beryllium dichloride
46.

The diagram is a model of a molecule of methane.  What is the formula for methane? 

a)

CH8

b)

C8H4

c)

CH4

d)

C8H8

47.

Group number =

a)

Number of valence electron

b)

Atomic number

c)

Atomic mass

d)

Mass number

48.

How many valence electrons does Hydrogen Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

49.

Ionic bonding involves

a)

transfer of electrons

b)

sharing of electrons

c)

holding onto electrons

d)

electrons are not involved

50.

Covalent compounds

a)

contain a sea of electrons

b)

share electrons

c)

transfer electrons

d)

keep their electrons

e)

give and take electrons

51.

Why do elements bond? select all that apply

a)

So they can take electrons from other elements

b)
To create a new element
c)
To become stable
d)

so they can have 8 valence electrons

52.
 A lone pair is defined as
a)
A pair of bonding electrons
b)
One non-bonding electron
c)
A pair of non-bonding electrons
d)
A pair of electrons on the central atom
53.

What is the correct Lewis Dot Structure for ammonia NH3

a)
b)
c)
d)
54.

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

a)

8

b)

4

c)

2

d)

3

55.

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

a)

Li

b)

Al

c)

C

d)

Be

56.

Metals tend to

a)

gain electrons

b)

lose electrons

57.

Nonmetals tend to

a)

gain electrons

b)

lose electrons

58.
An element with five valence electrons is
a)
phosphorus
b)
oxygen
c)
beryllium
d)
rubidium
59.
Three pairs of electrons are shared in a
a)
Single bond
b)
Double bond
c)
Triple bond
60.
In the correct Lewis structure for CH4, how many unshared electron pairs surround the carbon?
a)
2
b)
8
c)
0
d)
4
61.

Which of the elements in the picture has correct electron dot notation?

a)

1

b)

2

c)

3

d)

4

62.
How many bonds will C and H share?
a)
1
b)
2
c)
3
d)
4
63.

How many valence electrons does Nitrogen Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

d)

4 Valence electron

e)

5 Valence electron

64.

How many valence electrons does Magnesium Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

d)

4 Valence electron

e)

5 Valence electron

65.
an element will always have the same number of 
a)
neutrons
b)
protons
c)
isotopes
d)
atoms
66.
Rows on the period table are called _____ while columns are called _____.
a)
groups, families
b)
groups, periods
c)
periods, groups
d)
families, groups
67.
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
68.

Which is the correct molecular structure for carbon dioxide?

a)
b)
c)
d)
69.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
70.
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
a)
A
b)
B
c)
C
d)
D
71.
Which of the following is the correct Lewis structure for water?
a)
A
b)
B
c)
C
72.
What is the correct formula for this molecule?
a)
Si4F
b)
SiF4
c)
SiF
d)
Si4F4
73.

What do atoms that form positive ions tend to do?

a)

lose electrons

b)

gain electrons

c)

lose protons

d)

gain protons

74.

What usually forms a positive ion?

a)

metal

b)

nonmetal

c)

metalloid

d)

there is no way to tell

75.

Covalent compounds

a)

contain a sea of electrons

b)

share electrons

c)

transfer electrons

d)

conduct electricity

76.

This Lewis Dot Structure for water is correct

a)

True

b)

False

77.

What is the correct Lewis Structure for the bond between Mg and Cl?

a)

A

b)

B

c)

C

d)

D

78.
In an electron dot diagram, two pairs of shared electrons represents a ...
a)
single bond
b)
double bond
c)
triple bond
d)
quadruple bond
79.
A Nitrogen molecule (N2) has one triple bond. How many electrons do the nitrogen atoms share?
a)
1
1
b)
3
c)
4
d)
6
80.
How many are shared in a double bond?
a)
2
b)
4 pairs
c)
6
d)
4
81.

Is this the correct way to show calcium chloride?

a)

yes

b)

no

82.

How many are drawn incorrectly?

a)

1

b)

2

c)

3

d)

zero

83.

Which of these determines the identity of an atom?

a)

proton

b)

neutron

c)

valence electron

d)

protons and neutrons

84.

Gaining or losing protons in an atom changes its...

a)

isotope type.

b)

charge.

c)

identity. It becomes a different element.

85.

Which part of an atom has a positive charge?

a)

Proton

b)

Neutron

c)

Electron

d)

None of them

86.

Which part of an atom has a negative charge?

a)

Proton

b)

Neutron

c)

Electron

d)

None of them

87.

Which part of an atom has no charge?

a)

Proton

b)

Neutron

c)

Electron

d)

None of them

88.

Using the picture from a periodic table, what is the Atomic Number?

a)

26

b)

Fe

c)

55.845

d)

56

89.

Using the picture from a periodic table, what is the Atomic Mass?

a)

26

b)

Fe

c)

55.845

d)

56

90.

Using the picture from a periodic table, how many PROTONS are in Iron?

a)

26

b)

30

c)

55.845

d)

56

91.

When two atoms of the same element have different masses, they are called ______, and have a different number of ______.

a)

Neutrons; Isotopes

b)

Atoms; Isotopes

c)

Isotopes; Protons

d)

Isotopes; Neutrons

92.

The difference between a chemical and physical change is that...

a)

A chemical change makes a new substance and a physical change doesn't

b)

A physical change makes a new substance and a chemical change doesn't

c)

There is no difference between a chemical and physical change

d)

A chemical change makes something new and a physical change can only be measured microsopically

93.

What two particles determine the mass number?

a)

Protons and electrons

b)

Electrons and neutrons

c)

Protons and neutrons

94.
Isotopes are atoms that have different
a)
Mass numbers
b)
Element names
c)
Atomic Numbers
95.

Which element has similar chemical properties as Potassium?

A
B
C
D
96.

Match the trend with the correct definition

a)

The strength of attraction between an atom's nucleus and the electrons in that atom.

1.

Electronegativity

b)

The distance from the center of an atom and the furthest electron. This is a measure of an atom's size.

2.

Atomic Radius

c)

The energy required to remove an electron from an atom.

3.

Ionization Energy

d)

The likelihood that that an atom will participate in a chemical reaction

4.

Reactivity

97.

Match the following metals with their family name.

a)

Krypton (Kr)

1.

Noble Gas

b)

Oxygen

2.

Non-metal

c)

Arsenic

3.

Metalloid

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