Introduction and Electronic Configuration

Which one of the following $\mathrm{d}-$block elements has half-filled penultimate $\mathrm{d}-$subshell as well as half-filled valence $\mathrm{s}-$subshell?

In the transition elements, the incoming electron occupies $(\mathrm{n}-1)\mathrm{d}$ orbital in preference to _____.

Which of the following is a transition element as per the ground state electronic configuration?

Which of the following has a completely filled $\mathrm{d}$orbital?

Electronic configuration of $\text{Cu (Z=29)}$ is ______.

The valence shell electronic configuration of ${\text{Cr}}^{\text{2+}}$ ion is _____.

Which of the following general configuration of outermost shell represents chromium element? [$\mathrm{Cr}$ atomic number$= 24$]

Identify the transition element:

The general electronic configuration of transition elements is _____.

The number of unpaired electrons in a chromium atom is ______.

Atomic number of the element having an ${\mathrm{ns}}^1$ configuration and belonging to the $3\mathrm{d}$ transition series would be ______.

The electronic configurations of four elements are given below. Which element does NOT belong to the same family as others?

d-block metals belong to _____ periods of the periodic table.

Which of the following are d-block elements but NOT regarded as true transition elements?

Electronic configuration of manganese $\text{(Z=25)}$  is _______.

The first transition element is ______.

The transition elements are so named because ______.

In transition elements, the differentiating electron enters into ______ subshell.