N3/4

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N3/4
Bonding - Formulae
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Write the formula for silver (I) chloride
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AgCl
3
What is the valency of iron in iron (III) oxide?
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3
4
How is the valency of a transition metal shown in
the names of its compounds?
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Roman Numerals in brackets eg copper (II)
chloride valency 2
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What is the chemical formula of hydrogen sulphide?
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H2S
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What is the chemical formula of calcium oxide?
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CaO
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What is the valency of the Group 7 elements?
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1
8
What is the valency of the Group 2 elements?
7
2
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What is the chemical formula of hydrogen?
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H2
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What is the chemical formula of carbon
tetrachloride?
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CCl4
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What is meant by the prefix- Mono?
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Mono 1 ie carbon monoxide molecules contain one
oxygen atom (CO)
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What is meant by the prefix- Di?
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Di 2 ie carbon dioxide molecules contain two
oxygen atoms (CO2)
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What is meant by the prefix- Tri?
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Tri 3 ie sulphur trioxide molecules contain
three oxygen atoms (SO3)
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What is meant by the prefix- Tetra?
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Tetra 4 ie carbon tetrachloride molecules
contain four chlorine atoms (CCl4)
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How many atoms of each element are present in a
molecule of H2O?
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H 2 O 1
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How many atoms of each element are present in a
molecule of C6 H12O6?
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C 6 H 12 O 6
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Which elements have the most stable electron
arrangement?
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The Noble Gases
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Name the compound with the formula N2O4
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Dinitrogen tetroxide (tetraoxide)
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What type of elements do not normally form bonds
with other elements?
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The Noble Gases
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What type of elements bond together to form
covalent bonds?
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Non Metals
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What is a molecule?
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A group of atoms joined together by covalent bonds
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What is the formula for copper(II) Nitrate?(You
will need to use the Data Book)
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Cu2(NO3)1 Answer - Cu(NO3)2
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An ionic compound has the formula X2O.In what
Group of the Periodic Table could the element X
be found?
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Group 1 because its valency is 1
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What is the molecular formula for this molecule?
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C2H6O
H
H
C
H
H
O
C
H
H
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What is the correct formula for this molecule?
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H
CHCl3
C
Cl
Cl
Cl