The first, second and third ionisation energies (E_1 ,E_2 & E_3 )… - Vidyadip

MCQ

The first, second and third ionisation energies $(E_1 ,E_2$ & $E_3 )$ for an element are $7\,eV, 12.5\,eV$ and $42.5\,eV$ respectively. The most stable oxidation state of the element will be

A
$+1$
B
$+4$
C
$+3$
✓
$+2$

✓

Answer

Correct option: D.

$+2$

d
The +2 onidation state will be the most stable oridetion state.

It can be seen that $E_{3}$ is very high at 42.5 ev in to $E_{1}(7 eV )$ and $E_{2}$ comparision to $(12.5 eV )$ which implies the element reached a stable electronic configuration at $2^{n d}$ ionization and hence, $E_{3}$ is very high.

Hence, D is the correct anower

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