Question

Element having highest I.P. value is:

• A. Ne
• B. He
• C. Be
• D. N

Answer 1

The correct option is B He

The electronic configuration of the given element is:

Ne : $\left[He\right]2s^{2}2p^6$

He : $1s^2$

Be: $1s^{2}2s^2$

N : $\left[He\right]2s^{2}2p^3$

Although Ne, He and N all have fully filled stable configuration but the electron is to be removed from a 1s shell in case of He. 1s shell being closest to the nucleus makes quite tough to remove an electron from it. Thus, the element having the highest I.P. value is Helium.