Question

Values of $I{E}_1$, $I{E}_2$ and $I{E}_3$ of an element are 9.32, 18.21 and 553.83 eV. What information's do these data convey?

• A. The element has two electron in the valence shell.
• B. The element has two p-electron in the valence shell.
• C. Both (a) and (b)
• D. None of the two

Answer 1

The correct option is A

The element has two electron in the valence shell.

Here, we can see that after $I{E}_2$ , lot of energy is required to remove the third electron from the atom.

That means, after losing two electrons it is coming to a very stable state, i.e., noble gas configuration which implies that the element has two electrons in the valence shell.