AIIMS Physics Structure Of Atom Class 11 Questions

If energy of electron in ground state is −13.6 then find out speed of electron in fourth orbit of H⁻atom

If energy of electron in ground state is^{-13}.6 then find out speed of electron in fourth orbit of H⁻atom

15 eV is given to e⁻ in 4^{th} orbit then find it's final energy when it comes out of H⁻atom

If energy of 15 eV is given to electron in 4^{th} orbit then find it's final energy when it comes out of H⁻atom.

An electron is revolving in n = 3 orbit. What will be the magnetic field at the centre of hydrogen atom?

An electron collides elastically with H⁻like atom and excites it from ground state to n = 3. Find out the energy transfer to H⁻like atom

At which excited state of $\text{Be}^{3+}$ radius of $\text{e}^-$ will be same as $\text{H}$ atoms and electron in ground state.

Assertion: For revolving electron, direction of angular momentum and magnetic moment are opposite. Reason: Charge of electron is negative.

Energy of electron (in eV) in $2^{\text{nd}}$ orbit of $\text{He}^+$ ion?

Assertion: For an element generally N ≥ Z (N=number of neutrons, Z= atomic number) Reason: Neutrons always experience attractive nuclear force.

Assertion: Hydrogen atom consists of only one electron but its emission spectrum has many lines. Reason: Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.

Assertion : Hydrogen atom consists of only one electron but its emission spectrum has many lines. Reason : Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.

Find out the velocity of electron in second orbit of helium.

In a hydrogen spectrum, the third line of the Balmer series has a wavelength $\lambda$. Find the binding energy of the ground state.

What is the shortest wavelength present in the Paschen series of spectral lines?

The Bohr radii of a hydrogen like atom are r₁ and r₂. Find the wavelength of photon when electron jumps from r₂ to r₁.

If radiation corresponding to first line of “Balmer series” of $\text{He}^+$ ion knocked out electron from $1^{\text{st}}$ excited state of $\text{H}$ atom, the kinetic energy of ejected electron from $\text{H}$ atom would be ($\text{eV}$) $$\left[\text{Given } E_n = \frac{Z^2}{n^2}(13.6\text{ eV})\right]$$

The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 Å. The wavelength of the second spectral line in the Balmer series of singly-ionized helium atom is

Assertion: Electrons in the atom are held due to coulomb forces. Reason: The atom is stable only because the centripetal force due to Coulomb’s law is balanced by the centrifugal force.

Assertion : The force of repulsion between atomic nucleus and α-particle varies with distance according to inverse square law. Reason : Rutherford did α-particle scattering experiment.

In the following questions, a statement of assertion is given followed by a corresponding statement of reason. Assertion:(A) Hydrogen atom consists of only one electron but its emission spectrum has many lines. Reason:Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.

Assertion: The positive charged nucleus of an atom has a radius of 10⁻¹⁵ m. Reason: In α-particle scattering experiment, the distance of closest approach for α particle is 10⁻¹⁵ m.

Assertion: The positively charged nucleus of an atom has a radius of almost 10⁻¹⁵ m. Reason: In α particle scattering experimenting, the distance of closest approach for α-particles is ≈ 10⁻¹⁵ m.

Assertion : Electrons in the atom are held due to coulomb forces. Reason : The atom is stable only because the centripetal force due to Coulomb’s law is balanced by the centrifugal force.

Assertion (A) The magnetic moment (μₗ) of an electron revolving around the nucleus decreases with increasing principle quantum number (n). Reason (R) Magnetic moment of the revolving electron, μ ∝ n.