The energy required to pull the most loosely bound electron from an atom is known as ionization potential. It is expressed in electron volts. The value of ionization potential depends on three factors: (i) the charge on the nucleus (ii) the atomic radius and (iii) the screening effect of inner electron shells. The ionization energies, electron affinities, electronegativities, atomic and ionic radii and other physical properties usually shown a regular pattern of change within a group or along period with some irregularities. Ionization energies of five elements in kcal/mol are given below `{:("Atom","I","II","III"),("P",300,549,920),("Q",99,734,1100),("R",118,1091,1652),("S",176,347,1848),("T",497,947,1500):}` If Q reacts with fluorine and oxygen, the molecular formula of fluoride and oxide will be respectivelyA. `QF_(2), QO`B. `QF, Q_(2)O`C. `QF_(3), Q_(2)O_(3)`D. None of these