Along the period, atomic/ionic radius and metallic character generally decreases, while IE, EN and nonmetallic character and oxidizing power increases.
  If the value of electron gain enthalpy `(Delta_H_(eg))` of 4 elements are given below, then the element which may behave as strongest oxidizing agent is
`{:("Element",DeltaH_(eg)),(P,"-153 kJ/mole"),(Q,"-90 kJ/mole"),(R,"86 kJ/mole"),(S,"-209 kJ/mole"):}`

Options

A. Q
B. P
C. S
D. R

Answer

C