The general features of the structure of a hydrogen atom and hydrogen like species were quantitatively explained by Niels Bohr: Calculate the radius of the second orbit of `Li^(2+)` (Express the answer in nm)

The general features of the structure of a hydrogen atom and hydrogen like species were quantitatively explained by Niels Bohr: Write any postulate of the Bohr’s model of the hydrogen atom.

Bohr was the first to explain the structure of hydrogen atom and spectrum. Calculate the wavelength of the first line in the Lyman series of the hydrogen spectrum. ( R= 109677 cm^(-1))

Neils Bohr was the first to explain quantitatively the general features of hydrogen atom structure and its spectrum. Calculate the wave number of radiation due to transition of an electron from fourth orbit to second orbit. ( R_(H) =109677 cm^(-1) )

In the Bohr model, the first Bohr orbit of hydrogen atom lies 52.9 pm from the nucleus. Find the centrepetal acceleration experienced by the electron in this orbit?

If the speed of electron in the Bohr's first orbit of hydrogen atom be x, then the speed of electron in second orbit of He^(+1) is