$\begin{array}{cc}Sc-\left[Ar\right]3d^{1}4s^2& Ca-\left[Ar\right]4s^2\\ Mg-\left[Ne\right]3s^2& Co-\left[Ar\right]3d^{7}4s^2\end{array}$
Write down the group and period of each element.

Q. $\begin{array}{cc}Sc-\left[Ar\right]3d^{1}4s^2& Ca-\left[Ar\right]4s^2\\ Mg-\left[Ne\right]3s^2& Co-\left[Ar\right]3d^{7}4s^2\end{array}$
What are the use of writing electronic configuration this fashion?

Q. $11,17,10$ are the atomic number of elements $X,Y,$ and $Z.$
Write down their subshell electronic configuration, group, block, period,

Q. Write down the group numbers in which p - block elements are present in the modern periodic table.

Q. Symbols of certain elements are given write down the electronic configuration and find the period and group in which they are included.
a) $2311\mathrm{Na}$
b) $3517\mathrm{Cl}$
c) $199F$

Q. Write down the characteristics and period number of an element having group number 17.