Ionisation energy of He+ is 19.6 ´ 10–18 J atom–1. The energy of the first stationary state (n = 1) of Li2+ is

Q. Ionisation energy of He+ is 19.6 ´ 10–18 J atom–1. The energy of the first stationary state (n = 1) of Li2+ is

A.            4.41 ´ 10–16 J atom–1

B.            –4.41 ´ 10–17 J atom–1

C.            –2.2 ´ 10–15 J atom–1

D.            8.82 ´ 10–17 J atom–1

Answer: –4.41 ´ 10–17 J atom–1