Question

calculate radius of bohr's third orbit for hydrogen atom(in armstrong)

Answer 1

Answer:

Explanation:

The Bohr radius (a0 or rBohr) is a physical constant, exactly equal to the most probable distance between the nucleus and the electron in a hydrogen atom in its ground state. It is named after Niels Bohr, due to its role in the Bohr model of an atom. Its value is 5.29177210903(80)×10−11 m.

Answer 2

Answer:R=9r

Explanation:The Simplest Formula For Finding the radius of those chemical species which has one electron like hydrogen atom is given by Bohr's Model,

Rn=n²×R/Z

where Rn is radius of nth Shell, n is the Shell of which we have to find radius, Z is atomic number of the specie given and R is the Radius Of First orbit of that chemical Specie.

As in the question, we have

n=3

Z=1 For hydrogen

R=r

So putting into the formula,we get

R=9r