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Paper 3 · Atomic Structure and Bonding

Which graph shows the change in electronegativity down a group?

electronegativity - ZIMSEC Chemistry past paper diagram
AElectronegativity decreases then increases (zigzag pattern)
BElectronegativity increases linearly with atomic number
CElectronegativity decreases smoothly with atomic number
DElectronegativity shows multiple peaks with atomic number
Explanation: The marking scheme gives answer C. Electronegativity decreases down a group as atomic radius increases and nuclear attraction on bonding electrons decreases.

ZIMSEC Chemistry Paper 3, November 2009, Q8

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