The energy of an electron in the n th orbit of hydrogen atom is given by E n = - 13 . 6 n 2 eV . Find energy required to take the electron from the ground state to the first excited state.

The energy of n th state of hydrogen is given by E n = - 13 . 6 n 2 eV , Energy of ground state = E 1 = - 13 6 eV r Therefore, the energy of first excites state is given by putting n = 2 , thus we have, E 2 = - 13 . 6 2 2 eE n = - 13 . 6 4 eV = - 3 . 4 eV Therefore, energy to excite the electron from first excited state to the ground state = E = E 2 - E 1 = - 3 . 4 - ( - 13 . 6 ) = 10 . 2 eV

The energy of an electron in the n th orbit of hydrogen atom is given by E n = - 13 . 6 n 2 eV . Find energy required to take the electron from the ground state to the second excited state.

The energy of n th state of hydrogen is given by E n = - 13 . 6 n 2 eV , Energy of ground state = E 1 = - 13 6 eV r Therefore, the energy of second excites state is given by putting n = 3 , thus we have, E 3 = - 13 . 6 3 2 eE n = - 13 . 6 9 eV = - 1 . 51 eV Therefore, energy to excite the electron from ground state to second excited state = E = E 3 - E 1 = - 1 . 51 e V - ( - 13 . 6 eV ) = 12 . 09 e V

HARD

12th ICSE

IMPORTANT

Earn 100

A negatively-charged pion $(π)$ , whose mass is $273$ times the mass of electron moves in a circular orbit around a proton. It is a pi-mesic hydrogen atom. How many revolutions will the pion make during its lifetime of $10^{- 8} s$ in the ground state of the atom?

Important Questions on Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom

HARD

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 9

The electron in a given Bohr orbit has a total energy of

- 1.5 eV

. Calculate its kinetic energy when electron makes a transition to ground state. Ground state energy is

- 13.6 eV

HARD

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 9

The electron in a given Bohr orbit has a total energy of

- 1.5 eV

. Calculate its potential energy when electron makes a transition to ground state. Ground state energy is

- 13.6 eV

HARD

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 9

The electron in a given Bohr orbit has a total energy of

- 1.5 eV

. Calculate its wavelength of light emitted when electron makes a transition to ground state. Ground state energy is

- 13.6 eV

HARD

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 10

The energy of an electron in the

n

th orbit of hydrogen atom is given by

E_{n} = - (\frac{13.6}{n^{2}}) eV

. Find energy required to take the electron from the ground state to the first excited state.

HARD

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 10

The energy of an electron in the

n

th orbit of hydrogen atom is given by

E_{n} = - (\frac{13.6}{n^{2}}) eV

. Find energy required to take the electron from the ground state to the second excited state.

HARD

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 11

Calculate the frequency of the photon, which can excite the electron to

- 3.4 eV

from

- 13.6 eV

HARD

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 12

Two energy levels in an atom are separated by

2.3 eV

. What is the frequency of radiation emitted when the atom transits from the upper to the lower level?

HARD

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 13

The energy of an electron in the

n

th state of hydrogen atom is given by

E_{n} = - (\frac{13.6}{n^{2}}) eV

. Calculate the energy and frequency of a photon radiated when the electron de-excites from the first excited state to the ground state. To which spectral series does this photon belong?

A negatively-charged pion π, whose mass is 273 times the mass of electron moves in a circular orbit around a proton. It is a pi-mesic hydrogen atom. How many revolutions will the pion make during its lifetime of 10-8 s in the ground state of the atom?

Important Questions on Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom

Learn and Prepare for any exam you want !

A negatively-charged pion $(π)$ , whose mass is $273$ times the mass of electron moves in a circular orbit around a proton. It is a pi-mesic hydrogen atom. How many revolutions will the pion make during its lifetime of $10^{- 8} s$ in the ground state of the atom?