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
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