C1 RESOURCES

all of the c1 resources. revision guide, revision checklist

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  • Created on: 04-05-09 13:20
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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
Elements and compounds
o Elements have only one type of atom
o Elements are in the periodic table
o A column of the periodic table is called a group and contain
elements with similar properties
o There are about 100 different elements
o Atoms of each element are represented by a chemical symbol e.g.
O = an atom of oxygen
o Metals are on the left hand side of the periodic table
o Non-metals are on the right hand side of the periodic table
o There are more metals than non-metals
o When elements react, they join with other elements to form a
compound
o Compounds are held together by bonds
o Bonds involve either giving, taking or sharing of electrons
o The formulae of a compound shows how many atoms of an element
have joined together e.g. CaCO3 has 1 calcium, 1 Carbon and 3
oxygens
o No atoms are lost or made in a chemical reaction. Atoms are
simply re-arranged into new compounds.
o The mass of what you start with in a chemical reactions is the
same as the mass of what you end with
o Balanced equations can be written to show all the atoms involved
in a chemical reaction
Limestone
o Limestone is a rock that is quarried and it has many uses
o What are some environmental problems with limestone quarries?
e.g. pollution from machinery and compare this with economic
effects e.g providing jobs
o The formula of limestone is CaCO3 and has a chemical name of
calcium carbonate
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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.…read more

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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 ______________ and carbon
_____________________ gas. This type of reaction is called
_____________________ decomposition.
The gas can be tested for using _________________________
which goes ______________ if the gas is present.
3 This question is about limestone.…read more

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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
started off with. This series of reactions is called the ____________
cycle.
5 Balancing equations.
Complete the following equations by either putting in the missing numbers
or the formulae for the missing substances.…read more

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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 beams made from the m1ortar. His
results were 20 cm, 50 cm, 65 cm and 15 cm.
(a) What was the range of the student's results?
....................................................................................................................................
..............................................................................................................................
............(2)
(b) Work out the mean of his results.
..........................................................................................................................................…read more

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What other solid is needed to make concrete instead of mortar?
.......................................................................................…read more

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Alloys are harder than the metals on their own
o Carbon Steels are iron mixed with carbon.…read more

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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 obtained from its ores by smelting. true/false
n) Iron is produced in a blast furnace. true/false
o) In a blast furnace, limestone is added to reduce iron oxide.…read more

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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 was either smelting/melting or
oxidation/reduction.
Reduction is the addition/removal of oxygen from the metal oxide. When
we discovered electricity the more reactive/unreactive metals were then
extracted using electrolysis/smelting.…read more

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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.
.............................................................................................................................................
...
(b) These rocks contain enough metal to make it worth extracting.
.............................................................................................................................................
...
(c) This is a metal that contains other elements to give it specific
properties.
.............................................................................................................................................
...…read more

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