Question

The Bohr radius of the hydrogen atom in the ground state is 0.529 A. What is the Bohr radius of the hydrogen atom in first excited state ?

• A. 0.529 Å
• B. 1.058 Å
• C. 2.116 Å
• D. .2645 Å

Answer 1

Answer: (C)

2.116 Å

Answer 2

Z = 1; n = 2

r = $\frac{n^{2}}{2}$ (0.529)Å = $\frac{4}{1}$ (0.529)Å = 2.116Å