Worksheetsม5 Chemistry Topic 3 Revision
Total questions: 21
Worksheet time: 21mins
Name
Class
Date
1.
How do covalent bonds form?
a)
Donating & receiving valence e- between atoms.
b)
Opposite slight charges attract each other between compounds.
c)
Scientists are still not sure how they form.
d)
Sharing valence e- between atoms.
2.
In an electron dot diagram, two pairs of shared electrons represents a ...
a)
single bond
b)
double bond
c)
triple bond
d)
quadruple bond
3.
A Nitrogen molecule (N2) has one triple bond. How many electrons do the nitrogen atoms share?
a)
1
1
1
b)
3
c)
4
d)
6
4.
What is the correct formula for this molecule?
a)
NH
b)
N3H
c)
NH3
d)
NH4
5.
The energy required to break the bond between two covalently-bonded atoms is the ________.
a)
Covalent breaking force
b)
Boiling point
c)
Bond disassociation energy
d)
Energy of dissolution
6.
How many sigma bonds are in the following molecule?
a)
2
b)
3
c)
4
d)
5
7.
How many pi bonds are in the following compound?
a)
0
b)
1
c)
2
d)
3
8.
Name this compound.
N2O
N2O
a)
Dinitrogen monoxide
b)
Dinitrogen oxide
c)
Nitrogen oxide
d)
Nitrogen dioxide
9.
What is the chemical formula for iodine heptafluoride?
a)
IF7
b)
I7F
c)
I7F7
d)
IF
10.
What is the correct name for the molecule PBr5?
a)
Phosphorus Bromide
b)
Phosphorus Pentabromide
c)
Pentaphosphorus bromide
d)
Phosphorus Bromine
11.
Choose which polyatomic ion is known as the ammonium ion.
a)
NH4+
b)
NO31-
c)
NO21-
d)
N3-
12.
What is the formula for nitric acid?
a)
HNO2
b)
HNO3
c)
HNO4
d)
H2NO3
13.
Name the acid HF
a)
hydrofluoric acid
b)
Hypofluoric acid
c)
hydrogen fluorine acid
d)
fluoric acid
14.
What is the formula for carbonic acid?
a)
H2CO3
b)
H2CrO4
c)
H2C2O4
d)
HCO3
15.
How many total lone pairs would there be in the Lewis structure for the oxygen molecule?
a)
1
b)
2
c)
3
d)
4
16.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
17.
Which is the correct molecular structure for carbon dioxide?
a)
b)
c)
d)
18.
How many resonance structures for NO3- ion?
a)
1
b)
2
c)
3
d)
4
19.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Tetrahedral
d)
Linear
20.
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
21.
VSEPR stands for ________ theory.
a)
Valence Structure of Electron Pyramids and Regression
b)
Varied Structures of Electrons Paired and Replaced
c)
Varied Shell Energy of Protons and Radiation
d)
Valence Shell Electron Pair Repulsion
100 %
