CAIE A Level Chemistry 9701 · Chemical bonding
The Pauling electronegativities of sodium, magnesium and potassium are 0.9, 1.2 and 0.8, respectively.
Compare the electronegativity of with that of , and the electronegativity of with that of . For each pair, use the factors that determine electronegativity to explain the difference.
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.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.