WorksheetsBonding IGCSE edexcel
Total questions: 20
Worksheet time: 14mins
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.
Which substance will not conduct electricity?
aluminium
copper
plastic
steel
Which statement about the Periodic Table is correct?
Elements in the same period have the same number of outer electrons.
The elements on the left are usually gases.
The most metallic elements are on the left.
The relative atomic mass of the elements increases from right to left.
The table shows properties of four metals.
Which metal is the most suitable for aircraft construction?
A
B
C
D
Rescuers are drilling through fallen rock in order to rescue some men trapped in a cave. The drill
needs lubricating from time to time.
The following statements were made about the materials used for the drill tip and the lubricant
and the reasons for their use.
1 Diamond was used for the drill tip as it does not conduct electricity.
2 Diamond was used for the drill tip as it is very hard.
3 Graphite was used as the lubricant as it conducts electricity.
4 Graphite was used as the lubricant as it is soft and flaky.
Which statements are correct?
1 and 3
1 and 4
2 and 3
2 and 4
In which compounds are pairs of electrons shared between atoms?
1 methane
2 lead bromide
3 sodium chloride
1 only
2 only
1 and 3
1, 2 and 3
Diamond and graphite are allotropes of carbon.
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 table shows the electronic structure of four atoms.
Which two atoms combine to form a covalent compound?
W and X
W and Y
X and Y
X and Z
An aluminium atom has a nucleon number of 27 and a proton number of 13.
How many neutrons does this aluminium atom contain?
13
14
27
40
The diagram shows an electrical cable.
Which statement about the substances used is correct?
The coating is plastic because it conducts electricity well.
The core is copper because it conducts electricity well.
The core is copper because it is cheap and strong.
The core is iron because it is cheap and strong.
Diamond is extremely hard and does not conduct electricity.
Which statement explains these properties?
It has a lattice of positive carbon ions in a ‘sea of electrons’.
It has delocalised electrons and each carbon atom forms three covalent bonds with other carbon atoms.
It has no delocalised electrons and each carbon atom forms four covalent bonds with other carbon atoms.
It has strong ionic bonds between each carbon atom.
Different forms of the same element are called
(a)
Which of the following forms of carbon has a simple molecular structure?
C60 fullerenes
Diamond
graphite
graphene
metals can conduct because they have ____________ ____________ which can move and carry charge.
(a)
Molten ionic substances can conduct electricity because (a) are free to move
Word that means "can be hammered into shape"
(a)
Word that means "can be drawn into a wire"
(a)
The chemical name for quartz - a chemical with giant covalent structure
(a)
A mixture of metals and at least one other element
(a)
Diamond and graphite have giant covalent structures of carbon atoms.
Which statement describes graphite?
It has a strong, rigid three-dimensional structure.
It has four strong covalent bonds between each carbon atom.
It has layers, which can slide over each other.
It has no free electrons, so does not conduct electricity.
