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CHEMISTRY REVISION PACK

Tick the box if you have revised each section. Try the summary questions
and the exam style questions.

Topic 1 - Rocks and Building

Atomic Structure
o Protons and Neutrons are in the nucleus
o Electrons circle the nucleus on rings
o Electrons form bonds in compounds…

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o Limestone is heated in a kiln to give calcium oxide (CaO) which
has an informal name of quicklime
o CaCO3 CaO + CO2 . This reaction is called thermal
decomposition
o Carbonates of other metals such as copper carbonate CuCO3 will
decompose as above e.g. CuCO3 CuO + CO2…

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2 The decomposition of metal carbonates.

a) The two elements present in all carbonates are _______________
and _______________.
b) Magnesium carbonate has the formula, ____________. It is a
compound because it contains more than one type of
_______________ bonded _______________. When it is heated,
it _____________ to give magnesium ______________…

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When a lot of water is added to _______________
_________________, lime water is formed and this reacts with carbon
___________ gas to give calcium _____________ and water. The
calcium ____________ is a solid and turns the lime water ________,
because we get back to calcium ______________ which is what we…

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(3)



2 Mortars used in most modern buildings are made using cement.

A student tested the strength of a ready-mixed mortar. He did this by
dropping a mass onto a small mortar beam from increasing heights until
the beam broke in half. He tested 4…

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(ii) What other solid is needed to make concrete instead of mortar?

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Topic 2 - Rocks and Metals

Extracting Metals
o Most metals are found as compounds and need chemical reactions
to extract them
o Un-reactive metals like gold are found in the earths crust on its
own ­…

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o Alloys are harder than the metals on their own
o Carbon Steels are iron mixed with carbon.
o Low carbon steels are soft and easily shaped
o High carbon steels are hard but more brittle
o Stainless steels are iron mixed with Chromium and Nickel
o Stainless steels resist…

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) Metals are found in rocks called ores.
i true/false
) Reactive metals are often found in their native state.
j true/false
k) Reduction is the gain of oxygen by a metal. true/false
) Carbon is often used to reduce metal oxides to the metal.true/false
l
m) Copper can be…

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industry. It also does not corrode and is used medically to make
replacement hips/eyes for people.

4 Cross out the wrong alternatives in the following paragraph.

There are several different ways of extracting metals. In ancient times
the most reactive/unreactive metals like copper were extracted first.
The method used here…

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Exam Style Questions

1 Name the types of substance described in each part of this question.

(a) These elements are hard, tough and strong, conduct heat and
electricity well and are found in the middle of the periodic table.


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(b) These rocks contain enough metal to make it…

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