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WorksheetsChemical Bonding Review
Total questions: 62
Worksheet time: 35mins
Define the octet rule.
Atoms tend to gain or lose electrons to have 8 electrons in their outer shell
Atoms always have 10 electrons in their outer shell
Atoms share electrons only with metals
Atoms form ions with a charge of zero
What is an ionic bond?
A bond formed by sharing electrons between atoms
A bond formed by the transfer of electrons from one atom to another
A bond formed by free movement of electrons in a metal lattice
A bond formed by covalent sharing of electrons
What is a covalent bond?
A bond formed by sharing electrons between atoms
A bond formed by the transfer of electrons from one atom to another
A bond formed by free movement of electrons in a metal lattice
A bond formed by ionic attraction between charged particles
What does VSEPR theory stand for and what does it predict?
Valence Shell Electron Pair Repulsion; predicts molecular shapes
Valence Shell Electron Pair Rotation; predicts electron movement
Valence Shell Electron Pair Reaction; predicts chemical reactions
Valence Shell Electron Pair Redistribution; predicts bond types
What is a Lewis dot diagram used for?
To represent the movement of electrons in a metal lattice
To show the arrangement of valence electrons in an atom or molecule
To predict the chemical reactions of a compound
To calculate the molecular weight of a substance
Define electron configuration.
The arrangement of electrons in the nucleus of an atom
The arrangement of electrons in the orbitals of an atom
The movement of electrons in a metal lattice
The transfer of electrons between atoms
What is the difference between a single, double, and triple covalent bond?
The number of electrons shared between atoms
The number of atoms involved in the bond
The type of atoms forming the bond
The strength of the ionic attraction
What is an ion? Give an example.
An atom or molecule with a net electric charge due to the loss or gain of electrons; e.g., Na+
An atom or molecule with no electric charge; e.g., H2O
An atom or molecule that shares electrons; e.g., CH4
An atom or molecule that conducts electricity; e.g., Cu
What is the difference between a cation and an anion?
A cation is positively charged, and an anion is negatively charged
A cation is negatively charged, and an anion is positively charged
A cation shares electrons, and an anion transfers electrons
A cation conducts electricity, and an anion does not
Which of the following elements is most likely to form an ionic bond?
Carbon
Sodium
Oxygen
Nitrogen
Which pair of elements will most likely form a covalent bond?
Na and Cl
H and O
Mg and Br
K and F
Which statement about metallic bonding is correct?
Electrons are shared between two atoms only
Electrons are free to move throughout the metal lattice
Electrons are transferred from one atom to another
Metals do not conduct electricity
The octet rule states that atoms tend to:
Gain or lose electrons to have 8 electrons in their outer shell
Always have 10 electrons in their outer shell
Share electrons only with metals
Form ions with a charge of zero
Which molecule has a linear shape according to VSEPR theory?
H2O
CO2
NH3
CH4
Which of the following is the correct electron configuration for oxygen?
1s² 2s² 2p⁴
1s² 2s² 2p⁶
1s² 2s² 3p⁴
1s² 2p⁶
Which of the following is a property of ionic compounds?
Low melting point
Conduct electricity when dissolved in water
Soft and malleable
Poor conductor in all states
Which element is most likely to form a metallic bond?
Sodium
Chlorine
Oxygen
Nitrogen
Which of the following molecules is polar?
CO₂
CH₄
H₂O
N₂
Which of these has a tetrahedral shape?
CH₄
CO₂
NH₃
H₂O
Which of these is an example of a diatomic molecule?
CO₂
O₂
H₂O
CH₄
Which of these elements has a full octet in its natural state?
Neon
Oxygen
Sodium
Chlorine
Which of the following represents the correct Lewis dot structure for NaCl?
Na: · Cl: ······
Na: ··· Cl: ··
Na: Cl: ······
Na:⁺ Cl:⁻ (with Cl having 8 dots around it, Na with none)
Which of the following is the correct Lewis dot structure for H₂O?
O with two lone pairs and single bonds to two H atoms
O with three lone pairs and single bonds to two H atoms
O with one lone pair and single bonds to two H atoms
O with two lone pairs and double bonds to two H atoms
Select the correct electron configuration for Na.
1s2 2s2 2p6 3s1
1s2 2s2 2p6 3p1
1s2 2s2 2p6 2s1
1s2 2s2 2p6 3s2
Select the correct electron configuration for Cl.
1s2 2s2 2p6 3s2 3p5
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p4
1s2 2s2 2p6 3s2 3p3
Ionic compounds have high melting points because:
they have strong electrostatic forces between ions.
they have weak covalent bonds.
they are made of molecules with low energy.
they contain only non-metal atoms.
Covalent compounds often have lower melting points than ionic compounds because:
they have weaker intermolecular forces compared to the strong electrostatic forces in ionic compounds.
they contain metal atoms which lower the melting point.
they are always gases at room temperature.
they have larger molecular sizes than ionic compounds.
Predict the shape of CH₄ using VSEPR theory.
Trigonal planar
Tetrahedral
Linear
Bent
Metals are good conductors of electricity because:
they have free electrons that move easily through the metal
they have tightly bound electrons that do not move
they are always magnetic
they do not allow heat to pass through
What is the octet rule in chemistry?
Atoms tend to gain, lose, or share electrons to have 8 electrons in their outer shell.
Atoms tend to gain, lose, or share electrons to have 6 electrons in their outer shell.
Atoms tend to gain, lose, or share electrons to have 10 electrons in their outer shell.
Atoms tend to gain, lose, or share electrons to have 4 electrons in their outer shell.
What is an ionic bond?
Sharing of electrons between two nonmetal atoms.
Electrostatic attraction between oppositely charged ions.
Attraction between metal cations and a “sea” of delocalized electrons.
Arrangement of electrons in orbitals of an atom.
What does VSEPR theory predict?
The arrangement of electrons in orbitals of an atom.
Molecular shapes based on electron pair repulsion.
The sharing of electrons between two nonmetal atoms.
The attraction between metal cations and delocalized electrons.
How many electrons are shared in a double bond?
2 shared electrons.
4 shared electrons.
6 shared electrons.
8 shared electrons.
What is the charge on an ion formed by Calcium?
+1
+2
-1
-2
Which element in the pair will be more electronegative: Na or Cl?
Na
Cl
Both are equally electronegative.
Neither is electronegative.
Explain why water is a polar molecule.
Water is nonpolar because it has equal sharing of electrons.
Water is polar because it has an unequal sharing of electrons.
Water is polar because it has a symmetrical shape.
Water is nonpolar because it has a symmetrical shape.
Which element is represented by the symbol 'Na'?
Neon
Sodium
Nitrogen
Sulfur
What elements make up water (H2O)?
Hydrogen and Nitrogen
Hydrogen and Oxygen
Hydrogen and Carbon
Hydrogen and Sulfur
What do atoms do to achieve a stable electron configuration?
Gain or lose electrons to have 8 electrons in their outer shell
Gain or lose electrons to have 6 electrons in their outer shell
Gain or lose electrons to have 10 electrons in their outer shell
Gain or lose electrons to have 4 electrons in their outer shell
What is the electron configuration of oxygen?
1s² 2s² 2p⁴
1s² 2s² 2p⁶
1s² 2s² 2p³
1s² 2s² 2p⁵
What type of bond is formed when three pairs of electrons are shared between two atoms?
Single covalent bond
Double covalent bond
Triple covalent bond
Ionic bond
What property of ionic compounds allows them to conduct electricity when dissolved in water?
They have free electrons
They dissociate into ions
They form covalent bonds
They are nonpolar
Which molecule is represented by the formula O2?
CH4
O2
H2O
NaCl
Which element is represented by the symbol 'Ne'?
Neon
Sodium
Nitrogen
Sulfur
Why are metals good conductors of electricity?
They have localized electrons.
They have delocalized electrons.
They have high electronegativity.
They have ionic bonds.
What is the charge of a calcium ion (Ca²⁺)?
+1
+2
-1
-2
How many valence electrons does sulfur have?
4
5
6
7
What type of bond is present in CO₂?
Ionic
Covalent
Metallic
Hydrogen
How many electrons are shared in a double bond?
2
4
6
8
Which element is more electronegative, oxygen or chlorine?
Oxygen
Chlorine
Both are equally electronegative
Neither is electronegative
Why is water polar?
Because of its linear shape and equal sharing of electrons.
Because of its bent shape and unequal sharing of electrons.
Because of its tetrahedral shape and delocalized electrons.
Because of its trigonal planar shape and ionic bonds.
Oxygen has 6 valence electrons. How many more electrons does it need to fulfill the octet rule
1
2
3
4
Ionic bonds are formed by transferring an electron from a (a) to a nonmetal.
When a nonmetal gains electrons, it becomes a(n) (a) .
anion
cation
[Xe] 6s2 4f14 5d9
1s22s22p63s2
Choose the Noble Gas that you would use to begin the shorthand configuration of the following element.
Plutonium (Pu)
[Xe]
[Ne]
[Rn]
[Kr]
The image shows the partial electron configuration of manganese (Mn). Below there are two empty boxes. Correctly drag the final two answers in the correct order to finish its electron configuration.
(a) (b)
This could be the dot diagram of
Mg
Cl
C
O
This is a correct dot diagram for nitrogen (N)
Yes
No
