AQA
A-LEVEL
CHEMISTRY
1.2 Amount of Substance
Carbon Dioxide & Methane as Greenhouse Gases 1
Time allowed
48 minutes
QUESTION PAPER
Score Percentage
/40 %
4.1 | CELL BIOLOGY | QUESTION PAPER 1 1
, Q4. The following table shows the electronegativity values of the elements from
lithium to fluorine.
Li Be B C N O F
Electronegativity 1.0 1.5 2.0 2.5 3.0 3.5 4.0
(a) (i) State the meaning of the term electronegativity.
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(Extra space) ........................................................................................
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(2)
(ii) Suggest why the electronegativity of the elements increases from lithium to
fluorine.
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(Extra space) ........................................................................................
...............................................................................................................
(2)
(b) State the type of bonding in lithium fluoride.
Explain why a lot of energy is needed to melt a sample of solid lithium fluoride.
A-LEVEL
CHEMISTRY
1.2 Amount of Substance
Carbon Dioxide & Methane as Greenhouse Gases 1
Time allowed
48 minutes
QUESTION PAPER
Score Percentage
/40 %
4.1 | CELL BIOLOGY | QUESTION PAPER 1 1
, Q4. The following table shows the electronegativity values of the elements from
lithium to fluorine.
Li Be B C N O F
Electronegativity 1.0 1.5 2.0 2.5 3.0 3.5 4.0
(a) (i) State the meaning of the term electronegativity.
...............................................................................................................
...............................................................................................................
...............................................................................................................
(Extra space) ........................................................................................
...............................................................................................................
(2)
(ii) Suggest why the electronegativity of the elements increases from lithium to
fluorine.
...............................................................................................................
...............................................................................................................
...............................................................................................................
(Extra space) ........................................................................................
...............................................................................................................
(2)
(b) State the type of bonding in lithium fluoride.
Explain why a lot of energy is needed to melt a sample of solid lithium fluoride.
