Calculate the frequency of revolution of electron in the second Bohr's orbit of radius 2.12Å. Given, `h=6.6xx10^(-34)Js, m=9xx10^(-31)kg`.

Calculate the speed of the electron in the first Bohr orbit given that h=6.6xx10^(-34) Js, m=9.11xx10^(-31) kg and e=1.603xx10^(-19) C .

Calculate the frequency of revolution of the electron in this second Bohr orbit of the hydrogen atom. The radius of the orbit is 2.14 Å and the speed of the electron in the orbit is 1.09 xx 10^(6) m//s .

Calculate the momentum of electrons if their wavelengths is 2Å . Given : h = 6.626 xx 10^(-34) Js and m = 9.1 xx 10^(-31) kg

Calculate the frequency of revolution of electron in the first Bohr orbit of hydrogen atom, if radius of first Bohr orbit is 0.5Å and velocity of electron in the first orbit is 2.24xx10^6m//s .

Calculate the frequency of revolution of the electron in the first Bohr orbit of H-atom, if the radius of the 1st Bohr orbit is 0.50 A^@ and the velocity of electron in the first orbit = 2.24 xx 10^6 m//s .

Calculate the energy of an electron having de-Broglie wavelength 5500Å. Given, h=6.62xx10^(-34)Js, m_(e)=9.1xx10^(-31)kg .

Calculate the wavelength of a rested electron (in "Å") after it absorbs a photon of wavelength 9 nm. ["Given"h=6xx10^(-34) J-sec,m=9xx10^(-31) kg].