Filling of Electrons in Orbitals

Explain the Aufbau principle with copper and chromium.

Pauli exclusion principle states that the ground state of the atoms, the orbitals are filled in order of their increasing energies.

According to the Aufbau principle, valence electron in _____ must choose between 3d and 4s orbitals and as predicted by this sequence, it is found in 4s orbital.

Why does chromium $\left(\mathrm{Cr}\right)$ ) have exceptional electronic configuration? 

What are degenerate orbitals ?

Each orbital can accommodate at the maximum of two electrons with opposite spins. This statement is termed _____ principle.(Pauli's/Aufbau)

Which of the following sets of quantum number represents the ${19}^{th}$ electron of $Cr(Z=24)?$

In a given atom no two electrons can have the same values for all the four quantum numbers. This is called

Which of the following statements is correct?

Which is not in accordance with the Aufbau principle?

To which of the following set of quantum numbers the electrons will first enter? 

 $\left[\right(\mathrm{n}=5\left)\right(\mathrm{l}=0\left)\right]$ and $\left[\right(\mathrm{n}=3\left)\right(\mathrm{l}=2\left)\right]$

$\mathrm{Cr}$ has electronic configuration as:

The number of unpaired electrons in $\mathrm{F}{\mathrm{e}}^{3+}$ion is:

According to Aufbau principle, the correct order of energy of $3\mathrm{d},\mathrm{ }4\mathrm{s}\mathrm{ }$and $4\mathrm{p}$-orbitals is:

Illustrate the distribution of electrons in oxygen atom (atomic number= $8$) using orbital diagram.

Which of the following phenomena will occur when two atoms of the elements having same spin of electron approach for bonding?

The manifestation of band structure in solids is due to

The electrons identified by quantum numbers n and I: (i) n = 4, l=1,(ii) n = 4, l=0 (iii) n = 3, l = 2, and (iv)n = 3, l=1 can be placed in order of increasing energy, from the lowest to highest, as:

The electrons identified by quantum numbers $\text{n}$ and $\text{l}$:

(i) $\text{n} = \; 4\text{, l} = 1$
(ii) $\text{n} = \text{4, l} = 0$
(iii) $\text{n} = \text{3, l} = 2$
(iv) $\text{n} = \text{3, l} = 1$

can be placed in order of increasing energy as:

Which of the following statements in relation to the hydrogen atom is correct?