Chapter 6 - Electronegativity And Polarity

Question 1

Give three factors that affect electronegativity

Answer 1

Nuclear charge
Atomic radius
Electron shielding

Question 2

How does the Pauling electronegativity value change across a period? And Why?

Answer 2

Increases - the number of protons increases os stronger nuclear attraction, decrease in atomic radius so negative bonding pair is closer to the nucleus, similar shielding

Question 3

How does the Pauling electronegativity value change down a group? Why?

Answer 3

Decreases - although nuclear charge increases, the atomic radius increases so negative bonding pair in valence shell are further away from the nucleus, there are more inner shells so increased shielding