List of top Chemistry Questions on Quantum Mechanical Model of Atom

ન્યુક્લિયસથી અંતર (\( r \)) સામે ઓર્બિટલ વેવફંક્શન (\( \psi_r \)) ના પ્લોટને ધ્યાનમાં લો. ઓર્બિટલમાં બે રેડિયલ નોડ્સ (radial nodes) દર્શાવતી આકૃતિ છે:

नाभिक से दूरी \((r)\) के साथ तरंग फलन \((\psi_r)\) के निम्नलिखित योजनामूलक आलेखों पर विचार कीजिए। वह आकृति जो कक्षक में दो त्रिज्यीय नोड्स (radial nodes) को प्रदर्शित करती है, है :

Consider the following schematic plots of orbital wavefunction (\(\psi_r\)) against distance (\(r\)) from the nucleus.

The figure representing two radial nodes in the orbital is

The four quantum numbers for the electron in the outermost orbital of potassium \((Z=19)\) are

The angular momentum of an electron in an orbit \(X\) of hydrogen atom is \(\frac{2h}{\pi}\). Maximum number of orbitals possible in \(X\) is

The pair of orbitals with electron density maximum along the axes is

The \(2s\) and the \(2p\) orbital energies of hydrogen atom are \(E_{2s}(\mathrm{H})\) and \(E_{2p}(\mathrm{H})\), respectively. The \(2s\) and the \(2p\) orbital energies of lithium atom are \(E_{2s}(\mathrm{Li})\) and \(E_{2p}(\mathrm{Li})\), respectively. The correct option(s) about the orbital energies is(are)

Which of the following quantum numbers determines the shape of an orbital?

Which of the following is a correct set of four quantum numbers for a 4d orbital?

Which of the following is a correct set of four quantum numbers for 4d orbital?

The number of radial nodes in 3s and 2p orbitals, respectively are

The correct order of penetration power of the orbitals is

Which quantum number determines the shape of an orbital?

Which of the following is the CORRECT statement about \(\Psi^2\)?

The number of nodal surfaces present in '4s' orbital is

For a given sub-shell with azimuthal quantum number 'l' the number of magnetic quantum numbers possible is

Which of the following statements are correct about the postulates of quantum mechanical model of an atom? (i) The energy of electron in atom is quantized.
(ii) The existence of quantized electronic energy level is a result of the particle property of electrons.
(iii) The path of the electron can be determined accurately.
(iv) In a multi electron atom, the electrons are filled in various orbitals in the order of increasing energy.
(v) The probability of finding an electron at a point within an atom is proportional to the square of the orbital wave function.

Calculate the energy associated with third orbit of $\text{He}^+$.

For hydrogen atom, the orbitals with the lowest energy among the given orbitals are: (i) $4s$ (ii) $2p_x$ (iii) $3d_{z^2}$ (iv) $2p_y$

If \(n,l,m\) and \(s\) represent the symbols of quantum numbers, the impossible quantum number set for the electron in terms of \(n,l,m\) and \(s\) respectively is

Identify the orbital which has lobes not orienting on the axis

Consider the elements with atomic numbers \(Z=1\) to \(Z=20\). The number of elements with only one unpaired electron in their ground state is

If \(n,l,m\) and \(s\) represent the symbols of quantum numbers, the impossible quantum number set for the electron in terms of \(n,l,m\) and \(s\) respectively is

Identify the orbital which has lobes not orienting on the axis

Consider the elements with atomic numbers \(Z=1\) to \(Z=20\). The number of elements with only one unpaired electron in their ground state is