Question

Which excited state of Be³⁺ has the same orbit radius as that of the ground state of hydrogen atom ?

• A. 3
• B. 2
• C. 4
• D. 1

Answer 1

Answer: (B)

2

Answer 2

r_{H(ground state)} = 0.529 Å = 0.529 × $\frac{n^{2}}{4}$Å

Ž n² = 4 Ž n = 2