Paper 3 · Atomic Structure and Bonding
Which graph shows the change in electronegativity down a group?
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