Question

How many ionisation energies can carbon have

• A. 1
• B. 2
• C. 4
• D. 6

Answer 1

Answer: (C)

4

Answer 2

The energy required to remove an electron from outermost orbit of an isolated gaseous atom is called I.E. Now carbon has $4e^{-}$ in outermost shell. Thus it has 4 ionization energies.