For an element `'A'` , the first ionisation energy will be numerically equal to `:`

Options

A. `EA `of `A^(+)`
B. `EA` of `A^(2+)`
C. `IE` of `A^(2+)`
D. None of these

Answer

1

Explanation

`Aunderset(E.A=I.E)overset(I.E.)hArrA^(oplus)`