1.

IE2 of 3rd-period elements is as follows: Mg < Si < Al < P < S < Cl < Ar < Na Why?

Answer»

tion:Ionization energy is the amount of energy required to remove an electron from neutral gaseous ELECTRONS .Across period, in a periodic table from left to right I.E should increase.Third period elements are :Na, Mg, Al, Si, P, S , Cl, ArOrder of I.E in third period:NaAlAl due too its stable ns2 configuration of Mg.Case 2:P has more I.E than sulphur (S) a because phosphorous has half FILLED p sub SHELL in its valence shell that gives EXTRA stability and hence more energy is required to remove the electron.MARK. ME BRAINLIEST plzzZ



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