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WorksheetsChemistry the Earths Resources 5
Total questions: 10
Worksheet time: 5mins
How are the particles bonded together in metals?
Attractive forces between positive and negative ions
Covalent bonds
Attractive forces between atoms and delocalised electrons
Which of these properties is typical of metals?
Low melting point
Low boiling point
Good conductor of electricity
An (a) is a mixture of two or more elements, at least one of which is a metal.
Monomers affect the properties of the (a) they produce
(a) polymers will soften or melt easily when heated
In the past, firefighter uniforms were made from wool. Wool is obtained from sheep. Why are many fabrics made from polymers instead of wool? Tick one box.
Polymers are man-made
Polymers are more hard-wearing
Wool is more easily available
Wool is more flame resistant
Bronze is an alloy of copper and ______________.
aluminium
iron
magnesium
tin
Some musical instruments are made of brass.Parts of these instruments can be gold plated. What is the carat number of pure gold?
9
18
22
24
Poly(ethene) is made of carbon and hydrogen atoms. Poly(ethene) is a thermosoftening polymer. Figure 3 shows the structure of a thermosoftening polymer. Complete the sentence.Between the polymer chains in a thermosoftening polymer there are no (a) .
Heating would cause a thermosoftening polymer to
condense
dissolve
melt
