Question

The energy required to remove an electron from the outermost shell of an isolated gaseous atom is known as the ______________energy.

• A. kinetic
• B. atomic
• C. potential
• D. ionisation

Answer 1

The correct option is D ionisation

Ionisation energy is the minimum amount of energy required to remove the most loosely bound electron from the outermost shell of an isolated neutral gaseous atom. It is expressed as:

$A\left(g\right)+I.E\to A^{+}\left(g\right)+e^{-}$

Where,
‘A’ is the neutral gaseous atom.