Jee MainPeriodic Table And PeriodicityJEE Main 2021 (Online) 27th July Evening ShiftMCQ+4 / -12021ENHIThe correct order of first ionisation enthalpy is :AMg < S < Al < PBMg < Al < S < PCAl < Mg < S < PDMg < Al < P < SCheck AnswerClear SelectionReveal AnswerShow Explanation