Question

Amount of energy required to excite an electron of an atom from the lower energy state to its next higher energy state is defined as:

• A. Ionization potential
• B. Electron affinity
• C. Critical potential
• D. Reduction potential

Answer 1

Answer: (A)

Ionization potential

Amount of energy required to excite an electron of an atom from the lower energy state to its next higher energy state is defined as ionisation potential or ionisation energy. It can also define as the minimum amount of energy required to completely remove an electron from the outermost orbit of an isolated atom in its gaseous state. This energy is expressed in $KJ/mol.$ Ionisation energy of some elements is as :

1. Hydrogen (H) - 13.6

2. Helium (He) - 24.59

3. Boron (B) - 8.3

4. Carbon (C) - 11.26

5. Nitrogen (N) - 14.53