EASY

Earn 100

The minimum energy of an incident electron necessary for ionization of atom of hydrogen is equal to $W_{0}$ . Find minimum initial energy $W (= a W_{0})$ of singly ionized incident helium atom, necessary for ionization of stationary hydrogen atom.

Important Questions on Atoms

HARD

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

Consider a hydrogen-like ionized atom with atomic number

Z

with a single electron. In the emission spectrum of this atom, the photon emitted in the

n = 2 t o n = 1

transition has energy

74.8 eV

higher than the photon emitted in the

n = 3 t o n = 2

transition. Given that the ionization energy of the hydrogen atom is

13.6 eV

, what is the value of

Z

EASY

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

The amount of energy required to separate a hydrogen atom into a proton and an electron is

EASY

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

The ionization potential of hydrogenic ions

P

and

Q

are

V_{P}

and

V_{Q}

respectively. If

V_{Q} < V_{P}

then radii

EASY

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

The ionization potential of hydrogen atom is

13.6 V

. How much energy need to be supplied to ionize the hydrogen atom in the first excited state.

MEDIUM

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

Monochromatic radiation of wavelength

λ

is incident on a hydrogen sample in ground state. Hydrogen atom absorbs a fraction of light and subsequently emits radiations of six different wavelengths. The wavelength

λ

MEDIUM

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

λ_{2}

and

λ_{4}

are the wavelengths of photons required to excite the Hydrogen atom from its ground state to its second and fourth excited states, respectively. What is the correct ratio

λ_{2} / λ_{4}

EASY

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

Imagine that the electron in a hydrogen atom is replaced by a muon

(μ) .

The mass of muon particle is

207

times that of an electron and charge is equal to the charge of an electron. The ionization potential of this hydrogen atom will be:-

HARD

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

Drawing a neat energy level diagram, show the various spectral series of hydrogen atom and also write the formula for frequency of these spectral lines.

EASY

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

12 eV

energy is given to electron in third orbit of

H

-atom, then final energy of electron when it ionise from third orbit, is

MEDIUM

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

Minimum excitation potential of Bohr's first orbit of Hydrogen atom is_____.

EASY

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

If the light from Balmer series of hydrogen is used to eject photoelectrons from a metal, then the maximum work function of the metal can be

HARD

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

A neutron moving with a speed 'v' makes a head on collision with a stationary hydrogen atom in ground state. The minimum kinetic energy of the neutron for which perfactly inelastic collision will take place is :

MEDIUM

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

A hydrogen atom is in an excited state of principal quantum number

(n) .

It emits a photon of wavelength

λ

when it returns to the ground state, the value of

' n'

is ________

EASY

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

Energy of an electron in the lowest energy state of the hydrogen atom

= 13.6 eV

. Find the energy needed to remove an electron from the fourth orbit.

EASY

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

A hydrogen atom in the ground state absorbs,

∆ E

amount of energy. If the orbital angular momentum of the electron is increased by

\frac{h}{2 π}

(

h =

Plank constant), then the magnitude of

Δ E

EASY

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

Write the name of different series of emission spectrum of Hydrogen and represent them by the formula.

MEDIUM

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

Calculate the longest and shortest wavelength in the Lyman series of hydrogen emission spectrum. ( Rydberg constant

R = 1.1 \times 10^{7} m^{- 1}

)

EASY

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

In the hydrogen atom spectrum, let

E_{1}

and

E_{2}

are energies for the transition

n = 2 \to n = 1

and

n = 3 \to n = 2

respectively. The ratio

E_{2} / E_{1}

MEDIUM

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

H e^{+}

ion is in its first excited state. Its ionization energy is:

HARD

Physics>Modern Physics>Atoms>Bohr Model of the Hydrogen Atom

A singly ionized helium atom in an excited state

(n = 4)

emits a photon of energy

2.6 eV

. Given that the ground state energy of hydrogen atom is

13.6 eV

, the energy

(E_{t})

and quantum number

(n)

of the resulting state are respectively,

The minimum energy of an incident electron necessary for ionization of atom of hydrogen is equal to W0. Find minimum initial energy W (= aW0) of singly ionized incident helium atom, necessary for ionization of stationary hydrogen atom.

Important Questions on Atoms

Learn and Prepare for any exam you want !

The minimum energy of an incident electron necessary for ionization of atom of hydrogen is equal to $W_{0}$ . Find minimum initial energy $W (= a W_{0})$ of singly ionized incident helium atom, necessary for ionization of stationary hydrogen atom.