Which of the following has the highest 2nd ionization energy?

Question

Cl

Al

S

Na

P

Ar

Si

Mg

Answer 1

Na has the highest second ionization energy .

sscond ionization energy is the energy required to Ron I’ve a second electron.

Na iscrge smallest element of the group and will reach noble gas configuration after losing one electron.

therefore to remove a second electron will require a lot of energy !