Core Bonding 10 Marks

1. Complete the following statements from the word bank

(a) Covalent and ___________ are the two main types of compounds.

(b) In compounds _______are held together with bonds(c) Covalent bonds contain a shared pair of ________(d) A ____________is a group of atoms held together by a

covalent bond

2. The grid shows the name of some compoundsCarbon Monoxide Lithium Fluoride Aluminium OxideNickel Sulphate Nitrogen Hydride Iron Carbonate

Which two boxes show a compound which is a molecule?A B C

D E F

3. Conductivity can be used to show the type of bonding a substance contains(a) Draw a diagram to show how the conductivity of a substance is tested.

molecule, electrons, ions, covalent, ionic, bonds, atoms

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(b) Complete the following table

Substance Conductor/Non-ConductorAluminiumSulphurMagnesiumCarbon Chloride

4. Glucose is a covalent molecule with the formula C6H12O6. The table below shows the percentage by mass of each element present. Present this information as a bar graph.

Element Present Percentage by Mass (%)Carbon 40Hydrogen 6.7Oxygen 53.3

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Extension Bonding 20 Marks

Answer the following 3 questions using the diagram to the left.

1. Which diagram could be used to represent the structure of Sodium Chloride?

2. Which diagram could be used to show a covalent network structure?

3. Which diagram represents a compound made up of diatomic molecules?

4. The symbols for some elements are shown below

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1A B C D

A B C D

A B C D

(a) Identify the two elements which react to form a covalent network compound

A B C

D E F

(b) Identify the metal element which forms an ionic compound that does not contain an alkali metal.

A B C

D E F

(c) Identify the two elements which would react to form molecules with the same shape as a methane molecule.

A B CD E F

5. The table gives information about substances.

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(a) Identify the two ionic compounds.

A B C

D E F

(b) Identify the covalent molecular compound

A B C

D E F

(c) Identify the covalent network compound

A B C

D E F

(d) Which two box could represent a metal element.A B C

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D E F6. Chlorofluorocarbons (CFCs) are a family of compounds which are highly effective as refrigerants and aerosol propellants. However, they are now known to damage the ozone layer.One example of a CFC molecule is shown.

(a) How would the shape of the above molecule be described

(b) Draw the shape of an ammonia molecule

(c) The hydrogen Fluoride molecule can be represented as:

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Showing all outer electrons, draw a similar diagram to represent a molecule of water, H2O.

7. The properties of a substance depend on its type of bonding and structure. There are four types of bonding and structure.Discrete covalent

Covalent Network

Ionic Lattice

Metallic lattice

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Molecular

(a) Complete the table to match up each type of bonding and structure with its properties.

Bonding and structure type PropertiesDo not conduct electricity and have high melting pointsHave high melting points and conduct electricity when liquid but not when solidConduct electricity when solid and have a wide range of melting pointsDo not conduct electricity and have low melting points

(b) The above diagram shows the structure of diamond, name the type of bonding and structure present in diamond

(c) Carbon forms many compounds with other elements such as hydrogen. Draw a diagram to show how the outer electrons are arranged in a molecule of methane, CH4.

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8. In a chlorine molecule the atoms share two electrons in a covalent bond.

(a) Explain how the chlorine atoms are held together in a chlorine molecule

(b) Chlorine forms a solid ionic compound with potassium. Chloride ions have a stable electron arrangement. How do they achieve this arrangement?

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(c) Explain why ionic compounds are solid at room temperature.

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