CAIE A Level Chemistry 9701 · Chemical bonding
The Pauling electronegativities of two elements, A and B, are 0.9 and 3.0, respectively.
(a) Define the term electronegativity.
(b) Describe the factors that influence the electronegativity of an element. Explain the trends in electronegativity across a period and down a group of the Periodic Table.
(c) Predict the type of bonding present in the compound formed between A and B. Use the electronegativity values to justify your prediction.
7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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