In the Rutherford scattering experiment, what will be the correct angle for -scattering for an impact parameter, b = 0?
Atoms having different atomic number as well as different mass number but having same number of neutrons
1. isotopes 2. isobars
3. isotones 4. isodiaphers
Calculate the highest frequency of the emitted photon in the Paschen series of spectral lines of the Hydrogen atom:
The energy of 24.6 eV is required to remove one of the electrons from a neutral helium atom. The energy in (eV) required to remove both the electrons from a neutral helium atom is:
The wavelength of radiation emitted is when an electron jumps from the third to the second orbit of hydrogen atom. For the electron jump from the fourth to the second orbit of the hydrogen atom, the wavelength of radiation emitted will be
Which of the following transitions gives photon of maximum energy?
(1) n = 1 to n = 2 (2) n = 2 to n = 1
(3) n = 2 to n = 6 (4) n = 6 to n = 2
The ratio of the longest to shortest wavelengths in Lyman series of hydrogen spectra is [EAMCET (Med.) 2000; BCECE 2006; J & K CET 2006]
(1) (2) (3) (4)
Hydrogen atoms are excited from ground state of the principal quantum number 4. Then, the number of spectral lines observed will be
(a) 3 (b) 6
(c) 5 (d) 2