Quantum Mechanical Model of the Atom

In hydrogen atom, the degeneracy of the level with energy $\frac{-{\mathrm{R}}_{\mathrm{H}}}{9}$ is

Describe the significance of Heisenberg Uncertainty Principle.

What are degenerate orbitals?

Write the conclusions of Pauli Exclusion Principle.

Define the radial probability for an orbital according to schrodinger wave equation.

Explain radial probability density for $1\mathrm{s}$ and $2\mathrm{s}$ orbital.

Explain diamagnetic substances.

Explain paramagnetic substances.

Write the conditions for the substance to show paramagnetic behaviour.

According to Aufbau principle, describe the order of filling as $1\mathrm{s}, 2\mathrm{s} 2\mathrm{p}, 3\mathrm{s} 3\mathrm{p}, 4\mathrm{s}, 3\mathrm{d}$.

State the order of filling electrons in the orbitals.

Write the differences between orbit and orbital.

Write the significance of $\mathrm{\psi }$ square.

How $\mathrm{\psi }$ is associated with the atomic orbital corresponding to electron.

Define the wave function of an electron.

State two important developments which contributed to the formation of the quantum mechanical model of the atom.

What is the possible number of nodal planes present in the ${\mathrm{M}}^{\mathrm{th}}$ shell of $\mathrm{H}-$like species?

Which the following ion has $18$ electrons in the valence shell?

What is the uncertainty in position of an electron if uncertainty in its velocity is $0.001\%$. Planck's constant $\mathrm{h}=6.62\times {10}^{-34} \mathrm{Js}$.

The uncertainty in the position and velocity of a particle are ${10}^{-10} \mathrm{m}$ and $5.27 \mathrm{x} {10}^{-24} {\mathrm{ms}}^{-1}$ respectively. What is the mass of the particle. $(\mathrm{h}=6.625 \mathrm{x} {10}^{-34} \mathrm{Js})$.