Advertisements
Advertisements
प्रश्न
State any two limitations of Bohr’s model for the hydrogen atoms.
Advertisements
उत्तर
Two limitations of Bohr’s model for hydrogen atom:
- Bohr’s model for hydrogen atoms could not explain the line spectra of atoms other than hydrogen. Even for hydrogen, a more accurate study of the observed spectra showed multiple components in some lines which could not be explained on the basis of this model.
- It could not explain the varying intensity of emission lines.
APPEARS IN
संबंधित प्रश्न
The radii of Bohr orbit are directly proportional to ______
Using de Broglie’s hypothesis, obtain the mathematical form of Bohr’s second postulate.
The radius of electron's second stationary orbit in Bohr's atom is R. The radius of the third orbit will be ______
The wavelength of the first line in Balmer series in the hydrogen spectrum is 'λ'. What is the wavelength of the second line in the same series?
Which of the following statements about the Bohr model of the hydrogen atom is FALSE?
How many moles of electrons are required for reduction of 9 moles of Cr3+ to Cr?
Taking the Bohr radius as a0= 53 pm, the radius of Li++ ion in its ground state, on the basis of Bohr's model, will be about ______.
For which one of the following, Bohr model is not valid?
When hydrogen atom is in its first excited level, its radius is how many time its ground state radius?
The binding energy of an electron in nth orbit of the hydrogen atom is given by `"E"_"n" = 13.6/"n"^2 "eV."` The energy required to knock an electron from the second orbit in eV will be ____________.
Angular speed of an electron in the ground state of hydrogen atom is 4 × 1016 rad/s. What is its angular speed in 4th orbit?
Ratio of centripetal acceleration for an electron revolving in 3rd orbit to 5th orbit of hydrogen atom is ______.
An electron of mass 'm' is rotating in first Bohr orbit of radius 'r' in hydrogen atom. The orbital acceleration of the electron in first orbit (h = Planck's constant).
The minimum energy required to excite a hydrogen atom from its ground state is ____________.
If n is principal quantum number and r is the radius of the orbit in which electron revolves around nucleus, then its kinetic energy is ____________.
In any Bohr orbit of hydrogen atom, the ratio of K.E to P.E of revolving electron at a distance 'r' from the nucleus is ______.
What is the mathematical formula for the third postulate of Bohr's atomic model?
Which of the following series of transition of hydrogen spectrum falls in visible region?
The triply ionised beryllium (Be+++) has the same electron orbital radius as that of the ground state of the hydrogen atom. The energy state (n) of triply ionised beryllium is ______.
(Z for beryllium = 4)
The speed of an electron in ground state energy level is 2.6 × 106 ms-1, then its speed in third excited state will be ______.
Ultraviolet light of wavelength 300 nm and intensity 1.0 Wm−2 falls on the surface of a photosensitive material. If one percent of the incident photons produce photoelectrons, then the number of photoelectrons emitted from an area of 1.0 cm2 of the surface is nearly ______.
In Bohr’s atomic model, speed and time period of revolution of an electron in n = 3 level are respectively.
Calculate the energy of the electron in the ground state of the hydrogen atom. Express it in joule and in eV.
Find the momentum of the electron having de Broglie wavelength of 0.5 A.
