GCSEChemistry: Combined ScienceOCR GatewayExam Questions2. Elements, compounds & mixtures2.2 Bonding

 Bonding (OCR Gateway GCSE Chemistry: Combined Science)

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2.2 Bonding

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2.2 Bonding

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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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21 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.

q4-paper-1-june-2018-ocr-gcse-chem

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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    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

    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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    41 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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    51 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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    61 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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    71 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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    81 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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    91 mark

    The diagram shows the electronic structure of some elements:

    electronic-configuration-of-li-na-and-k-ocr-gcse-mcq

    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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    101 mark

    Polymers are long covalent molecules, often known as 'macromolecules'.

    Figure 1 shows a section of a polymer chain.

    section-of-polymer-2-2-mcq-q10

    Figure 1

    What is the empirical formula of this polymer?

    • C2H2

    • C2HCl

    • C2H2Cl2

    • C2H3Cl

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    111 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.

    q4-paper-1-june-2019-ocr-gcse-chem

    Which elements are in Period 2?

    • A and E

    • C and B

    • C and G

    • D and F

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    121 mark

    Which substance has ionic bonding?

    • Carbon dioxide

    • Carbon monoxide

    • Magnesium oxide

    • Oxygen

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    131 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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    141 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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    151 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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    161 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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    171 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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    181 mark

    What is the electronic structure of sulfur?

    • 2

    • 2, 6

    • 2, 8, 6

    • 2, 8, 8, 6

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    191 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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    201 mark

    Look at the diagram of a methane molecule.

    q15-paper-3-june-2018-ocr-gcse-chem

    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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    211 mark

    Which of these substances has a giant covalent structure?

    • Carbon dioxide

    • Magnesium oxide

    • Sulfur dioxide

    • Silicon dioxide

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