The number of unpaired electrons in a carbon atom in the excited state is:

Which of the following sets of quantum numbers is not possible?

The magnetic quantum number for an electron when the value of principal quantum number is $2$ can have ............ values.

Explain the meaning of the $+ve$ and $-ve$ signs in the context of the wave function $\psi$ for an electron.

The angular part of the wave function for an orbital is given by $\psi_{(\theta, \phi)} = \left( \frac{15}{4\pi} \right)^{1/2} \sin \theta \cos \theta \sin \phi$,where $\theta$ is the angle from the $z$-axis. The angular node$(s)$ are:

The energy of atomic orbitals in a given shell follows the order: