Question

Which of the following has larger value of the property indicated:
A) F or Cl (electron affinity)
b) F or F (electronegativity)
c) Na or K (electropositivity)


please explain me too!!!​

Answer 1

Answer:

Electron Affinity refers to force of attraction of the valence electrons by the nucleus. It increases from Left to Right across a period and decreases Down a group.

Therefore F having 1 shell will undergo more force of attraction than Cl which has 2 shells. Hence F has more electron affinity than Cl.

Electronegativity refers to tendency to attract shared pair of electrons towards itself. Down a group, the trend of electronegativity decreases.

Hence F is most electronegative element than other elements like Cl, Br, I, etc.

Electropositivity is the opposite of electronegativity and increases down a group. Therefore K present below Na in a group is therefore more electropositive.

Hope it helped !!