The element with quantum numbers $n = 2, l = 1, m = 1, s = -1/2$ has the following position in the periodic table:

The extra stability of half-filled subshells is due to:
$(A)$ Symmetrical distribution of electrons
$(B)$ Smaller coulombic repulsion energy
$(C)$ The presence of electrons with the same spin in non-degenerate orbitals
$(D)$ Larger exchange energy
$(E)$ Relatively smaller shielding of electrons by one another
Identify the correct statements.

If the value of azimuthal quantum number is $3$,the possible values of magnetic quantum number would be

The electronic configuration $1s^2 2s^2 2p_x^1 2p_y^1 2p_z^1$ corresponds to which of the following elements?

In an atom,the order of increasing energy of electrons with quantum numbers $(i)$ $n=4, l=1$,(ii) $n=4, l=0$,(iii) $n=3, l=2$,and (iv) $n=3, l=1$ is:

$Fe$ (atomic number $= 26$) atom has the electronic arrangement: