In a hydrogen atom, electron is in n^{th} excited state. It may come down to second excited state by

English

Gujarati

Hindi

12.Atoms

normal

In a hydrogen atom, the electron is in $n^{th}$ excited state. It may come down to second excited state by emitting ten different wavelengths. What is the value of $n$ :

$6$

$7$

$8$

$5$

Solution

Number of possible emission lines are $n(n-1) / 2$ when an electron jumps from $n^{t h}$ state to ground state. In this question, this value should be

$(n-1)(n-2) / 2$

Hence, $10=(n-1) \frac{n-2}{2}$

Solving this, we getn $=6$

Standard 12

Physics

In the Rutherford's nuclear model of the atom, the nucleus (radius about $10^{-15} \;m$ ) is analogous to the sun about which the electron move in orbit (radius $\approx 10^{-10} \;m$ ) like the earth orbits around the sun. If the dimensions of the solar system had the same proportions as those of the atom, would the earth be closer to or farther away from the sun than actually it is? The radius of earth's orbit is about $1.5 \times 10^{11} \;m.$ The radius of sun is taken as $7 \times 10^{8}\;m$

easy

$\alpha – $ particles of energy $400\, KeV$ are bombarded on nucleus of $_{82}Pb$. In scattering of $\alpha – $ particles, its minimum distance from nucleus will be

medium

Electrons with de-Broglie wavelength $\lambda $ fall on the target an $X-$ ray tube. The cut off wavelength of emitted $X-$ ray is

normal

What was the thickness of the gold foil kept in the Geiger-Marsden scattering experiment?

medium

In the spectrum of hydrogen atom, the ratio of the longest wavelength in Lyman series to the longest wavelength in the Balmer series is

normal

In a hydrogen atom, the electron is in $n^{th}$ excited state. It may come down to second excited state by emitting ten different wavelengths. What is the value of $n$ :

Solution

Similar Questions

$\alpha – $ particles of energy $400\, KeV$ are bombarded on nucleus of $_{82}Pb$. In scattering of $\alpha – $ particles, its minimum distance from nucleus will be

Electrons with de-Broglie wavelength $\lambda $ fall on the target an $X-$ ray tube. The cut off wavelength of emitted $X-$ ray is

What was the thickness of the gold foil kept in the Geiger-Marsden scattering experiment?

In the spectrum of hydrogen atom, the ratio of the longest wavelength in Lyman series to the longest wavelength in the Balmer series is

Start a Free Trial Now