Physics problem3?

Question

What is bohr radius

Answer 1

In the Bohr model of the structure of an atom, put forward by Niels Bohr in 1913, electrons orbit a central nucleus. The model says that the electrons orbit only at certain distances from the nucleus, depending on their energy. In the simplest atom, that of hydrogen, a single electron orbits, and the smallest possible orbit for the electron, that with the lowest energy, is most likely to be found at a distance from the nucleus called the Bohr radius.

According to 2002 CODATA, the Bohr radius has a value of 5.291772108×10−11 m (i.e., approximately 53 pm or 0.53 ångströms).

Answer 2

Nothing but radius of orbit