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WorksheetsG8_Chem_Chemical Bonding_Worksheet
Total questions: 28
Worksheet time: 2hrs 12mins
Potassium, K, forms a compound with fluorine, F. Which statements about this compound are correct?
1.The compound is ionic.
2. The formula of the compound is KF.
3. The compound is soluble in water.
A. 1, 2 and 3
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only
Sodium chloride is an ionic solid. Which statement is not correct?
A. Ions are formed when atoms lose or gain electrons.
B. Ions in sodium chloride are strongly held together.
C. Ions with the same charge attract each other.
D. Sodium chloride solution can conduct electricity.
Element X is in Group I of the Periodic Table.
X reacts with element Y to form an ionic compound.
Which equation shows the process that takes place when X forms ions?
A. X + e → X+
B. X – e → X
C. X + e → X
D. X – e → X+
Which change to an atom occurs when it forms a positive ion?
A. It gains electrons.
B. It gains protons.
C. It loses electrons.
D. It loses protons.
Rubidium is in Group I of the Periodic Table and bromine is in Group VII.
Rubidium reacts with bromine to form an ionic compound.
Which row shows the electron change taking place for rubidium and the correct formula of the rubidium ion?
A
B
C
D
Two elements, represented by and , form a compound. Which diagram shows molecules of the compound?
A
B
C
D
The electronic structures of atoms P and Q are shown.
P and Q react to form an ionic compound.
What is the formula of the compound?
A. Q7P
B. QP
C. QP3
D. QP7
The table shows the electronic structures of four atoms.
Which two atoms conine to form an ionic compound?
W and X
W and Y
X and Y
X and z
The table shows the electronic structures of four atoms.
Which two atoms conine to form an ionic compound?
W and X
W and Y
Y and Z
Z and W
The electronic configuration of an ion is 2.8.8.
What could this ion be?
A
B
C
D
When sodium chloride is formed from its elements, each chlorine atom ……1…… one ……2……. .
Which words correctly complete gaps 1 and 2?
A
B
C
D
The electonic structures of atoms X and Y are shown.
X and Y from a cobalent compound.
What is its formula?
A
B
C
D
Statements 1, 2 and 3 are about diamond and graphite.
1 They are different solid forms of the same element.
2 They each conduct electricity.
3 They have atoms that form four equally strong bonds.
Which statements are correct?
1 only
3 only
1 and 3
2 and 3
In the following diagrams, X and Y are atoms of different elements.
Which diagram correctly shows the arrangement of outer electrons in a molecule of methane?
A
B
C
D
Which statement about bonding is not correct?
Carbon can form four single covalent bonds.
Chlorine atoms react to gain a noble gas electronic structure.
Covalent bonding involves losing and gaining electrons.
Hydrogen molecules have the formula H2
Covalent bonds are formed when electrons are ...... .
Most covalent compounds have ........... electrical conductivity.
shared / high
shared / low
transferred / high
transferred / low
In th molecules CH4, HCl and H2O,
Which atoms use all of thier outer shell electons in bonding?
A
B
C
D
In the diagrams, circles of different sizes represent atoms of different elements.
Which diagram represents hydrogen chloride gas?
A
B
C
D
The electronic structures of atoms X and Y are shown.
X and Y react to form a covalent compound.
What is the formula?
XY5
XY3
XY
X3Y
In which copoind are pairs of electrons shared between atoms?
1. sodium chloride
2. methane
3. lead bromide
1 only
2 only
1 and 3
1, 2 and 3
Diamond and graphite are macromolecules.
Which statement about diamond and graphite is not correct?
They are giant structures with high melting points.
They are non-conductors of electricity.
They contain only atoms of a non-metal.
They have covalent bonds between the atoms.
The ‘lead’ in a pencil is made of a mixture of graphite and clay.
When the percentage of graphite is increased, the pencil slides across the paper more easily.
Which statement explains this observation?
Graphite has a high melting point.
Graphite is a form of carbon.
Graphite is a lubricant.
Graphite is a non-metal.
The diagrams show the structures of two forms, P and Q, of a solid element.
What are suitable uses of P and Q based on their structures?
P and Q - drilling
P - lubricating, Q - drilling
P - drilling, Q - lubricating
P and Q - lubricating
Graphite is a form of carbon.
Why can graphite be used as a lubricant?
Graphite contains delocalised electrons which move throughout the structure.
Graphite contains weak covalent bonds so the atoms move easily.
Graphite has a low melting point so it easily turns into a liquid.
Graphite has weak forces of attraction between layers so they can move.
Which change to an atom occurs when it forms a negative ion?
It gains electrons.
It gains protons.
It loses electrons.
It loses protons.
Number of electrons in Na+ ion?
10
11
9
12
Number of protons in Cl- ion
18
20
17
19
Q+ is an ion of element Q.
What has the highest value in the ion?
the nucleon number
the number of electrons
the number of neutrons
the proton number
