Home / Chemistry / Question
MCQ
Which of the following has the highest first ionization energy?
Chemistry
A Na
B Mg
C Al
D Si
Explanation

Mg has a stable 3s2 fully filled subshell, making its first ionization energy higher than Na (3s1), Al (3s2 3p1), and Si (3s2 3p2).

Related MCQs

Which gas is evolved when dilute HCl reacts with zinc?
Chemistry View
Which quantum number describes the shape of an orbital?
Chemistry View
How many structural isomers are possible for C3H8O?
Chemistry View
Which of the following is the functional group of an aldehyde?
Chemistry View
Which of the following is an example of nucleophilic aromatic substitution?
Chemistry View
Which of the following is an electrophile?
Chemistry View