Why first ionisation enthalpy of Mg is higher than Al

Asked by prashantyadav592 | 29th Jan, 2020, 09:39: AM

Expert Answer:

Electronic configurations of Mg=1s2 2s22p3s2
Electronic configuration of Al=1s2 2s22p3s2 3p1
 
Mg has the first ionizaation enthalpy higher than that of Al due to fullfilled s orbital, it required high energy to remove electron from outermost shell.

Answered by Ravi | 31st Jan, 2020, 02:24: PM