11 mark
Which statement shows that lead is a metal?
It is a dull grey colour.
It is in Group 4 of the periodic table.
It is in Period 6 of the periodic table.
It is malleable and can be easily shaped.
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Bonding (OCR Gateway GCSE Chemistry: Combined Science)
Exam Questions
1 hour35 questions21 mark
Which of these general properties correctly describes a metal?
Ductile and good conductor of heat
High density and forms negative ions
Malleable and low density
Shiny and brittle
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31 mark
What is the position of carbon in the Periodic Table?
Period 1, Group 4
Period 2, Group 4
Period 4, Group 1
Period 4, Group 2
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41 mark
This is a section of the Periodic Table.
In which section of the Periodic Table would you find non-metals?
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51 mark
Which Period 3 element is in Group 2?
Aluminium
Boron
Calcium
Magnesium
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61 mark
Sodium fluoride has the formula NaF. The formula of the sodium ion is Na+.
What is the formula of the fluoride ion?
F+
F-
F2+
F2-
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71 mark
What changes did Mendeleev make to improve his Periodic Table?
He arranged elements by mass number.
He arranged elements by the number of neutrons.
He put elements with low melting points on the left and high melting points on the right.
He realised some elements had not yet been discovered so left spaces for them.
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11 mark
Covalent molecules can be displayed using a variety of diagrams and written formulae.
Which of the following shows the number of non-bonding electrons present in a molecule?
Dot and cross diagrams
Ball and stick diagrams
Molecular formula
All of the above
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21 mark
Ammonia, NH3, is a small covalent molecule.
How many non-bonding, outer-shell electrons are present in one molecule of ammonia?
0
2
5
6
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31 mark
Elements can bond together in many different ways, by sharing, gaining or losing electrons. In some of the resulting structures, strong electrostatic forces of attraction occur as a result of the type of bonding.
Which of the following examples does not involve strong electrostatic forces of attraction?
Bonding between sodium ions and chloride ions
Bonding in calcium
Bonding between carbon and hydrogen atoms
Bonding in the alloy of gold and copper
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41 mark
Element X has the following properties:
- melts at 450oC
- boils at 1091oC
- Forms an ion with a 2+ charge
Which is most likely to be element X?
Sodium
Magnesium
Carbon
Oxygen
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51 mark
Metals and non-metals commonly have different physical and chemical properties.
Which of the following is a property of metal elements only?
Hard
Conduct electricity when solid
Solid at room temperature
React with oxygen to form basic oxides
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61 mark
The diagram shows the electronic structure of some elements:
Which of the following does not explain why they would be placed in the same group of the modern Periodic Table?
They have similar chemical reactions
They each have one outer shell electron
They all form metal hydroxides when they react with water
They react with halides (X) to form metal halide salts with the formula MX
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71 mark
The positions of some elements in the Periodic Table are shown by the letters A to G.
The letters shown are not the symbols of the elements.
Which elements are in Period 2?
A and E
C and B
C and G
D and F
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81 mark
Which substance has ionic bonding?
Carbon dioxide
Carbon monoxide
Magnesium oxide
Oxygen
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91 mark
The electronic structure of an atom of an element is 2.8.8.2.
In which period of the Periodic Table is this element found?
1
2
4
8
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101 mark
The electronic structure of an atom of an element is 2.8.8.2.
In which group of the Periodic Table is this element found?
1
2
4
8
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111 mark
Which statement about covalent bonding is true?
Electrons are transferred from one atom to another.
Electrons are delocalised.
Electrons are shared between atoms.
Ions are formed.
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121 mark
Sodium is an element that can be found in the Periodic Table.
A sodium atom contains 11 electrons.
Which statement about sodium is true?
Sodium is in Group 2 of the Periodic Table.
Sodium is in Period 2 of the Periodic Table.
Sodium is in Period 3 of the Periodic Table.
Sodium is in Group 3 of the Periodic Table.
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131 mark
Mendeleev’s arrangement of elements led to our modern Periodic Table.
How did Mendeleev arrange the elements in his Periodic Table?
In order of decreasing atomic mass and similar physical properties.
In order of increasing atomic number and similar physical properties.
In order of decreasing atomic number and similar chemical properties.
In order of increasing atomic mass and similar chemical properties.
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141 mark
What is the electronic structure of sulfur?
2
2, 6
2, 8, 6
2, 8, 8, 6
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151 mark
Look at the diagram of a methane molecule.
Which statement about methane is correct?
Electrons are transferred from hydrogen atoms to carbon atoms.
The covalent bonds in methane are weak.
The force of attraction between methane molecules is weak.
The ionic bonds between carbon and hydrogen are very strong
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161 mark
Which of these substances has a giant covalent structure?
Carbon dioxide
Magnesium oxide
Sulfur dioxide
Silicon dioxide
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171 mark
An element reacts with oxygen to form an acidic oxide.
Which area of the Periodic Table is the element from?
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181 mark
An element gains electrons to form a full outer shell.
Which part of the Periodic Table will the element be from?
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11 mark
Magnesium reacts with element Z to form a compound with the formula MgZ.
Which of the following elements could be Z?
Hydrogen
Fluorine
Oxygen
Chlorine
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21 mark
When atoms gain or lose electrons they can end up having the same electronic structure as other ions or atoms. The nucleus still remains untouched.
Which of the following does not have the same electronic structure as the others in the list?
Na+ ion
O2- ion
Ne atom
Cl- ion
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31 mark
Polymers are long covalent molecules, often known as 'macromolecules'.
Figure 1 shows a section of a polymer chain.
Figure 1
What is the empirical formula of this polymer?
C2H2
C2HCl
C2H2Cl2
C2H3Cl
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41 mark
Which equation shows the formation of a Group 2 metal ion?
M represents a Group 2 metal and e− represents an electron.
M + e− → M+
M + 2e− → M2+
M → M+ + e−
M → M2+ + 2e−
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51 mark
Different substances have characteristic melting and boiling points, depending on the strength of the bonds or forces holding them together.
Which explains why methane has a lower melting point than sodium chloride?
Covalent bonds are weaker than ionic bonds
Intermolecular forces are weaker than ionic bonds
Covalent bonds are stronger than ionic bonds
Intermolecular forces are stronger than ionic bonds
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