Bohr's radius `(a_(0))` is the radius of the______stationary state of hydrogen atom.

Options

A. highest
B. second
C. first
D. zero

Answer

C

Explanation

Radii of the different stationary states of `H` atom are expressed as:
`r_(n) = n^(2)a_(0)`
where `a_(0) = 52.9 pm` is called the Bohr radius.