17. In each pair, which species has the larger radius? a) Fe or Fe 3+ c) O or O
ID: 1017085 • Letter: 1
Question
17. In each pair, which species has the larger radius?
a) Fe or Fe3+ c) O or O2-
b) F- or F d) K+ or Na+
18. Arrange the species in each set in order of increasing ionization energy.
a) Al, P, Si d) Ca, Mg, Sr
b) Ar, He, Ne e) Br, Cl, I
c) Fe, Fe2+, Fe3+
19. Which member of each pair has the greater electron affinity?
a) Ar or Cl c) F or O
b) Br or Cl d) Al or Mg
Explanation / Answer
17. Cation radius always less than the neutral atom
Anion radius always larger than the neutral atom
a) Fe or Fe3+ Fe is larger radius c) O or O2- O2- is larger radius
b) F- or F F- is larger radius d) K+ or Na+ K+ is larger radius
18.
a) Al, P, Si Al<Si<P d) Ca, Mg, Sr Sr<Ca<Mg
b) Ar, He, Ne Ar<Ne<He e) Br, Cl, I I<Br<Cl
c) Fe, Fe2+, Fe3+ Fe<Fe+2 <Fe3+
19.
a) Ar or Cl Cl has the greater electron affinity c) F or O O has the greater electron affinity
b) Br or Cl Cl has the greater electron affinity d) Al or Mg Al has the greater electron affinity