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M5 Chemistry Mid-year Exam Revision JB

Total questions: 166

Worksheet time: 1hrs 23mins

Name
Class
Date
1.

Which charge is POSITIVE?

a)

Proton

b)

Neutron

c)

Electron

d)

Cell

2.

Which charge is NEGATIVE?

a)

Proton

b)

Neutron

c)

Electron

d)

Cell

3.

Which particle is NEUTRAL?

a)

Proton

b)

Neutron

c)

Electron

d)

Cell

4.

All of the COLUMNS on the Periodic Table are called?

a)

Periods

b)

Rows

c)

Groups

d)

Lines

5.

All of the ROWS on the Periodic Table are called what?

a)

Periods

b)

Groups

c)

Columns

d)

Lines

6.

What is the ATOMIC # of Oxygen - O?

a)

6

b)

7

c)

8

d)

9

7.

What is the Atomic MASS of Lithium - Li?

a)

9.012

b)

6.94

c)

4.002

d)

1.008

8.

Carbon - C has an atomic MASS of what?

a)

12.011

b)

6

c)

7

d)

14.007

9.

Group 2 on the Periodic Table has what name?

a)

Alkali Metals

b)

Halogens

c)

Noble Gases

10.

The NOBLE GASES (Group 8) are considered...

a)

Metals

b)

Nonmetals

c)

Metalloids

d)

None

11.

How many NEUTRONS does Nitrogen - N have?

a)

6

b)

7

c)

8

d)

9

12.

How many NEUTRONS does Magnesium - Mg have?

a)

10

b)

11

c)

12

d)

13

13.

Which type of particle would you find floating around the nucleus, outside of the atom, with its negative charge?

a)

Proton

b)

Neutron

c)

Electron

d)

Nucleus

14.

Which TWO particles are found housed in the nucleus of the atom?

a)

Protons and Electrons

b)

Protons and Neutrons

c)

Electrons and Neutrons

d)

Protons, Neutrons, and Electrons

15.

What are the building blocks of matter?

a)

atoms

b)

cells

c)

neutrons

d)

protons

16.

The nucleus of an atom is made up of ___________________.

a)

protons and neutrons.

b)

neutrons and electrons

c)

protons and electrons

d)

neutrinos and antineutrinos

17.

Which subatomic particle has a negative charge in the atom?

a)

neutron

b)

proton

c)

electron

d)

quark

18.

ALL atoms of the same element have...

a)

the same number of protons

b)

the same number of nucleons

c)

a different number of nucleons

d)

a different number of electrons

19.

Which of the following does not have an electrical charge?

a)

neutron

b)

neuron

c)

electron

d)

proton

20.

What charge does an atom have when it GAINS electrons?

a)

positive

b)

negative

c)

neutral

21.

What charge does an atom have when it LOSES electrons?

a)

positive

b)

negative

c)

neutral

22.

What subatomic particle changes in an ion?

a)

the number of electrons

b)

the number of protons

c)

the number of neutrons

23.

The smallest unit of matter is called...

a)

an atom

b)

a molecule

c)

a compound

d)

an ion

e)

an element

24.

How many electrons can the first energy level hold?

a)

1

b)

2

c)

8

d)

0

25.

What is the charge of an atom that has gained one electron?

a)
-1
b)
-2
c)
+1
d)
+2
26.

How many electrons does Si contain?

a)

14

b)

28

c)

2

d)

4

27.

Each row on the periodic table represents:

a)

an energy level

b)

a sublevel

c)

an electron

d)

an orbital

28.
Which is an electron?
a)
A
b)
B
c)
C
29.
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.
30.

How many valence electrons?

a)

2

b)

3

c)

4

d)

5

31.

What is the electron configuration of this atom?

a)

2 6 10

b)

2 8 18

c)

2 8 8 4

d)

2 8 8

32.

How many valence electrons does this element have?

a)

2

b)

8

c)

12

d)

4

33.
What is the oxidation number of Fe in FeO?
a)
+1
b)
-1
c)
+2
d)
-2
34.
What is the oxidation number of O in CO2?
a)
+2
b)
-1
c)
+4
d)
-2
35.
What is the oxidation number of N in NO21- ?
a)
-3
b)
+4
c)
-2
d)
+3
36.

If an atom loses electrons during a chemical reaction, the atom was...

a)

oxidised

b)

reduced

c)

neutralised

d)

stabilised

37.
What is the oxidation of C in CH4?
a)
-4
b)
-1
c)
+4
d)
+1
38.

What is oxidation number of Mn in MnO2?

a)

0

b)

+2

c)

-2

d)

+4

39.
What is the oxidation number of Ca in Ca3N2?
a)
+3
b)
+2
c)
-3
d)
-2
40.

What is the oxidation number of S in SO4 2-?

a)

-2

b)

+2

c)

+6

d)

-4

41.

What is the oxidation number of Cr in Cr2O72-?

a)

-2

b)

+2

c)

+6

d)

+12

42.

What is the oxidation number of P in K3PO4?

a)

+1

b)

+5

c)

-2

d)

0

43.

What is the oxidation number of O in the compound H2O2?

a)

0

b)

-1

c)

-2

d)

+2

44.

What is the oxidation number of Fe in Fe2O3?

a)

0

b)

-2

c)

+2

d)

+3

45.

What is the oxidation number of H in NaH?

a)

0

b)

+1

c)

-1

d)

+2

46.

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

a)

1+

b)

3+

c)

5+

d)

7+

47.

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

a)

+2

b)

+3

c)

+4

d)

+5

48.

What is the oxidation state of H in H2?

a)

+2

b)

+1

c)

0

d)

None of the above

49.

What is the oxidation number of N in NO2-?

a)

+4

b)

+3

c)

+2

d)

+1

50.

What is the oxidation number Fe in FeCl3?

a)

+1

b)

+2

c)

+3

d)

+4

51.

What is the oxidation number Cr in K2CrO4?

a)

+6

b)

+5

c)

+4

d)

+3

52.

What is the oxidation number N in NH4+?

a)

-1

b)

-2

c)

-3

d)

-4

53.

What is the oxidation number of Mg?

a)

0

b)

+1

c)

+2

d)

+3

54.

What is the oxidation number of Cu2+?

a)

-1

b)

0

c)

+1

d)

+2

55.

What is the oxidation number of Na+?

a)

0

b)

+1

c)

+2

d)

+3

56.
What is the oxidation number of O in CO2?
a)

+2

b)

-1

c)

+4

d)

-2

57.
What is the oxidation number of N in NO21- ?
a)

-3

b)

+4

c)

-2

d)

+3

58.

Calculate the oxidation number for the underlined atom.

a)

+4

b)

-4

c)

+2

d)

-2

59.

Calculate the oxidation number for the underlined atom.

a)

-2

b)

+2

c)

+1

d)

-1

60.

Calculate the oxidation number of the red underlined element: NaCl.

a)

+1

b)

-1

c)

-2

d)

0

61.

Calculate the oxidation number of the red underlined element: NH4+

a)

+3

b)

-1

c)

-3

d)

0

62.

Calculate the oxidation number of the red underlined element: HSO4-1

a)

+6

b)

-2

c)

+5

d)

-1

63.

oxidation number Cu2+ is ...

a)

-1

b)

0

c)

+1

d)

+2

64.

oxidation number Na+ is ...

a)

0

b)

+1

c)

+2

d)

+3

65.

oxidation number Mg is ...

a)

0

b)

+1

c)

+2

d)

+3

66.
What is the oxidation number of Fe in FeO?
a)
+1
b)
-1
c)
+2
d)
-2
67.

What is the oxidation state of Cl in ClO- ?

a)

0

b)

+1

c)

-1

d)

+2

68.

...................................................is a positive or negative number assigned to an atom to indicate its degree of oxidation or reduction.

a)

An oxidation number

b)

A reduction number

c)

A valance number

69.

The oxidation number of a monatomic ion is equal in magnitude and sign to its ionic charge.

a)

True

b)

False

70.

For any neutral compound, the sum of the oxidation numbers of the atoms in the compound must equal ..........

a)

-1

b)

+2

c)

0

71.

What is the charge, or oxidation number, for elements in Group 7?

a)

+ 1

b)

-7

c)

-1

72.

What is the charge, or oxidation number, for elements in Group 2?

a)

-2

b)

+2

c)

-3

73.
What is the oxidation number of O in CO2?
a)
+2
b)
-1
c)
+4
d)
-2
74.
What is the oxidation number of N in NO21- ?
a)
-3
b)
+4
c)
-2
d)
+3
75.

What is the oxidation state of S in SO3 ?

a)

-3

b)

-2

c)

+4

d)

+6

76.

What is the oxidation state of N in NO2- ?

a)

+2

b)

+3

c)

-1

d)

-4

77.

What is the oxidation number of O in Li2O ?

a)

-1

b)

-2

c)

+1

d)

+2

78.

Determine the oxidation number of the red underlined element.

NaCl

a)

+1

b)

-1

c)

-2

d)

0

79.

Determine the oxidation number of the red underlined element.

NaClO4

a)

+7

b)

-1

c)

+6

d)

0

80.

Determine the oxidation number of the red underlined element.

CaN2

a)

+1

b)

-3

c)

-1

d)

0

81.

For any neutral compound, the sum of the oxidation numbers of the atoms in the compound must equal ..........

a)

-1

b)

+2

c)

0

82.
What is oxidation number of Mn in MnO2 ?
a)
0
b)
+2
c)
-2
d)
+4
83.
What is the oxidation number of Ca in Ca3N2?
a)
+3
b)
+2
c)
-3
d)
-2
84.
What are oxidation numbers?
a)
Number of electrons in the outer most energy level
b)
Number of protons
c)
Electrons gained or lost in chemical bonding
d)
Number of neutrons gained or lost
85.

Oxidation number of O in the compound H2O:

a)

0

b)

-1

c)

-2

d)

+2

86.

Oxidation number of Fe in its elemental form:

a)

0

b)

-2

c)

+2

d)

+3

87.

Oxidation number of H in NaH:

a)

0

b)

+1

c)

-1

d)

+2

88.

Oxidation number of H in H2O:

a)

0

b)

+1

c)

-1

d)

+2

89.

Give the oxidation number of Nitrogen and Oxygen in N2O molecule.

a)

Nitrogen +1, Oxygen -2

b)

Nitrogen -1, Oxygen -2

c)

Nitrogen +2, Oxygen -2

d)

Nitrogen -3, Oxygen -2

90.

Give the oxidation number of all elements in sulfur dioxide, SO2 molecule.

a)

S-2 and O-2

b)

S+4 and O-2

c)

S-4 and O-2

d)

S-2 and O-1

91.

If an atom LOSES electrons during a chemical reaction, the atom was...

a)

Oxidized

b)

Reduced

c)

Neutralized

d)

Precipitated

92.

Reduction is the ___________ of electrons.

a)

loss

b)

gain

c)

transfer

d)

share

93.

Determine the oxidation number of chromium in CrO42-.

a)

5

b)

6

c)

4

d)

2

94.

Which statement is true?

Mg → Mg2+ + 2e–

a)

Mg gains 2 electrons

b)

Mg gains 1 electron

c)

Mg loses 1 electron

d)

Mg loses 2 electrons

95.

A decrease in oxidation number.

a)

oxidation

b)

combination

c)

reduction

96.

Which is a substance that oxidizes another substance by accepting its electrons?

a)

an oxidising agent

b)

a reducing agent

c)

combustion

97.

Which of the following is the balanced half -reaction for the oxidation of Cu to Cu+2?

a)

Cu --> Cu+2

b)

Cu + 2e- --> Cu+2

c)

Cu - 2e- --> Cu+2

d)

Cu --> Cu+2 + 2e-

98.

In a redox reaction, the species reduced

a)

gains electrons and is the oxidizing agent

b)

loses electrons and is the oxidizing agent

c)

gains electrons and is the reducing agen

d)

loses electrons and is the reducing agent

99.

Which is a substance that oxidizes another substance by accepting its electrons?

a)

an oxidation number

b)

a reducing agent

c)

an oxidizing agent

100.

In which substance does sulfur have a negative oxidation number?

a)

Na2S

b)

SO2

c)

S

101.

What is the oxidation number of chlorine in ClO3- ?

a)

5

b)

1

c)

0

d)

2

102.

When an atom gains a valence electron, it becomes a(n) _____________ ion.

a)

positive

b)

negative

c)

neutral

103.

When an atom loses a valence electron, it becomes a(n) _____________ ion.

a)

positive

b)

negative

c)

neutral

104.
Where are metals located on the periodic table?
a)
Blue
b)
Green
c)
Red
105.
Where are the nonmetals located on the periodic table? 
a)
Blue
b)
Red
c)
Green
106.
What charge will an Oxygen ion have? 
a)
+1
b)
-1
c)
+2
d)
-2
107.
If an element has 3 valence electrons, what charge will likely form on its ion ?
a)
+3
b)
+5
c)
-3
d)
-5
108.

What is the charge of a sodium ion?

a)

+2

b)

+1

c)

-1

d)

-2

109.
Which of the following has a -3 charge?
a)
Boron
b)
Fluorine
c)
Nitrogen
d)
Neon
110.

What is the charge of a Lithium ion?

a)

-2

b)

-1

c)

+1

d)

+2

111.

What is the charge of a Beryllium (Be) ion?

a)

-2

b)

-1

c)

+1

d)

+2

112.
Anions are...
a)
Positive
b)
Negative
c)
Neutral
d)
Crying
113.

What is the correct name of the compound CaCl2?

a)

Calcium dichloride

b)

Calcium dichlorine

c)

Calcium chlorine

d)

Calcium chloride

114.

What is the correct name for the compound LiF?

a)

Lithium fluoride

b)

Lithium fluorine

c)

monolithium monofluoride

d)

lithium monofluoride

115.

How many atoms of oxygen are in a molecule of Ca3(PO4)2

a)

1

b)

2

c)

4

d)

8

116.

A _______ is an ion that contains more than one ion.

a)

monatomic ion

b)

complex ion

c)

polyatomic ion

d)

diatomic ion

117.

How many atoms are present in CaCO3?

a)

5

b)

2

c)

4

d)

6

118.

How many atoms are present in (NH4)2SO4?

a)

3

b)

10

c)

15

d)

12

119.
Ions that are made of more than one atom are called...
a)
ionic compounds
b)
crystals
c)

polyatomic ions

d)
ionic bonds
120.
Ionic bonds form between two ions that have...
a)
ionic compounds
b)
negative charges
c)
positive charges
d)
opposite charges
121.

Which is most likely to form a NEGATIVE ion?

a)

an element from Group 7

b)

a metal

c)

an element from Group 1

d)

an element with atoms that have eight valence electrons

122.
A(n) _____________ is an atom or group of atoms that has an electric charge. 
a)

ion

b)

electron

c)

molecule

d)

compound

123.

When an atom loses a valence electron, it becomes a ____________ ion.

a)

positive 

b)

negative

c)

neutral

124.

Is this an example of a covalent or ionic bond: Calcium Oxide (CaO)?

a)

Covalent Bond

b)

Ionic Bond

125.

Why do ionic bonds form?

a)

so the number of protons equals the number of electrons

b)

to fill the outermost energy level to make the atom stable

c)

so an atom can become unstable

126.

if NONMETALS are more likely to GAIN electrons, they will form...

a)

anions

b)

neutral atoms

c)

cations

d)

molecules

127.

If an aluminum atom has 13 protons (+) and 10 electrons (-), what is it's charge?

a)

Al+3

b)

Al+13

c)

Al+10

d)

Al-10

128.
Elements in Group 1 lose one electron to form ions with a _________________ charge.
a)
1+
b)
2+
c)
0
d)
1-
129.

In the chemical formula for an ionic compound, which item is written first?

a)

positive ion (cation)

b)

negative ion (anion)

c)

subscript

d)

it's alphabetical

130.
What element always has an oxidation number of +1?
a)
Hydrogen
b)
Fluorine
c)
Chlorine
d)
Iodine
131.

The transfer of valence electrons from a metal to a non metal is known as __________.

a)

covalent bonding

b)

metallic bonding

c)

molecular bonding

d)

ionic bonding

132.

A(n) _________ is an ion with a positive (+) charge.

a)

anion

b)

cation

c)

ion

d)

solute

133.

Hydrogen's ion is...

a)

H+ 

b)

H2+

c)

H3+

d)

He+

134.

Lithium's ion is...

a)

L-

b)

Li+

c)

Li2+

d)

L+

135.

Sodium's ion is...

a)

S+

b)

S-

c)

Na+

d)

Na-

136.

Calcium's ion is...

a)

Ca+

b)

Ca2+

c)

Ca-

d)

Ca2-

137.

Potassium's ion is...

a)

P+

b)

P-

c)

K-

d)

K+

138.

Aluminum's ion is...

a)

Al3+

b)

A2+

c)

Al3-

d)

A3+

139.

Magnesium's ion is...

a)

Mn+

b)

Mg+

c)

Mg2+

d)

Mn2+

140.

Oxygen's ion is...

a)

Ox2+

b)

Ox2-

c)

O2+

d)

O2-

141.

Nitrogen's ion is...

a)

Ni3+

b)

Ni3-

c)

N3-

d)

N3+

142.

Chlorine's ion is...

a)

Cl+

b)

Cl-

c)

C+

d)

C-

143.

Phosphorus' ion is...

a)

Ph3+

b)

Ph3-

c)

P3+

d)

P3-

144.

Fluorine's ion is...

a)

Fl1+

b)

F1-

c)

Fl2+

d)

F2-

145.

Sulfur's ion is...

a)

S2-

b)

Su2-

c)

S1-

d)

Su1-

146.

A positive ion forms when ________.

a)

an atom loses one or more valence electrons

b)

an atom gains one or more valence electrons

c)

electrons are pulled into the nucleus

d)

electrons are pushed out of the nucleus

147.

Why is the calcium ion Ca2+Ca^{2+} more stable than the calcium atom (Ca)?

a)

Twenty electrons are more stable than eighteen electrons.

b)

Eighteen electrons are less stable than twenty electrons.

c)

The two electrons more than the noble gas configuration is more stable.

d)

The noble gas configuration is more stable.

148.

In the ionic solid sodium chloride (NaCl), there is a ________ ratio of sodium ions to chlorine ions.

a)

one to two

b)

two to one

c)

one to one

d)

one and a half to one

149.

A negatively charged atom is called a(n) ________.

a)

cation

b)

anion

150.

Binary ionic compounds always consist of _______ .

a)

a cation and an anion

b)

two cations

c)

two anions

151.

Ionic bonds form due to _______.

a)

attraction between opposite charges

b)

attraction between two nuclei

c)

attraction between a nucleus and another atom's electrons, as well as the overall opposite charges of two ions

d)

attraction between electrons and a cation

152.

Metals ______ electrons when they become ions.

a)

lose

b)

gain

c)

neither

153.

Non-metals ______ electrons when they become ions.

a)

lose

b)

gain

c)

neither

154.

How many electrons are in a Li+ ion?

a)

1

b)

2

c)

3

d)

4

155.

What is an ion?

a)

a small atom

b)

a charged atom

c)

a large atom

d)

a cute atom

156.

TRUE or FALSE?

OIL RIG =

Oxidation is Loss of Electrons and Reduction is Gain of Electrons.

a)

True

b)

False

157.

TRUE or FALSE?

LEO the lion says GER =

Loss of Electrons is Oxidation & Gain of Electrons is Reduction.

a)

True

b)

False

158.

The two same charges will _________ each other.

a)

attract

b)

repel

c)

opposite

159.

The two different charges will ___________ each other.

a)

repel

b)

attract

c)

opposite

160.

When an object gains electrons it becomes __________.

a)

neutral

b)

positively charged

c)

negatively charged

161.
The Electric Force is strongest when charges are...
a)
close together
b)
far apart
c)
the electric force is constant everywhere
162.

When distance increases, electrostatic force ____________; we call this relationship ____________ proportional.

a)

decreases; directly

b)

decreases; inversely

c)

increases; inversely

d)

increases; directly

163.

Which of the following does not react with water?

a)

Copper

b)

Lithium

c)

Sodium

d)

Potassium

164.

Which of the following metals easily get rusted to form brown deposits on it?

a)

Lead

b)

Gold

c)

Aluminium

d)

Iron

165.

Which metal is MORE reactive than calcium?

a)

magnesium

b)

potassium

c)

silver

d)

aluminum

166.

Which of the following is NOT a clue that a chemical change has occurred?

a)

change in color

b)

production of gas

c)

change in termperature

d)

change in shape

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