Question

The minimum energy in electron volt required to strip a ten times ionised sodium atom (i.e., Z = 11) of its last electron is-

• A. 13.6 eV
• B. $rac{13.6}{11}eV$
• C. 13.6 × 11 eV
• D. 13.6 × (11)² eV

Answer 1

Answer: (D)

13.6 × (11)² eV

Answer 2

E = 13.6 Z² = 13.6 × 11² eV