Complete the table.

Element	Atomic No.	Electronic configuration	Group Number	Period Number
Lithium	_____	$2,1$	$1$	$2$
Oxygen	$8$	_____	_____	_____
Argon	$18$	_____	_____	_____
Calcium	_____	$2,8,8,2$	_____	_____

 

The symbol of an element is given below. Write its electronic configuration and find the period and group to which it belongs. 

${}_6{}^{12}\mathrm{C}$.   
 

The symbol of an element is given below. Write its electronic configuration and find the period and group to which it belongs. 

${}_{12}{}^{24}\mathrm{Mg}$.

The symbol of an element is given below. Write its electronic configuration and find the period and group to which it belongs. 

${}_{17}{}^{35}\mathrm{Cl}$.

The symbol of an element is given below. Write its electronic configuration and find the period and group to which it belongs. 

${}_{13}{}^{27}\mathrm{Al}$.

The symbol of an element is given below. Write its electronic configuration and find the period and group to which it belongs.

${}_{10}{}^{20}\mathrm{Ne}$.

There are three shells in the atom of element '$\mathrm{X}$'. $6$ electrons are present in its outermost shell.

(a) Write the electronic configuration of the element. 

(b) What is its atomic number? 

(c) In which period does this element belong to? 

(d) In which group is this element included? 

(e) Write the name and symbol of this element? 

(f) To which family of element does this element belong to? 

(g) Draw the Bohr atom model of this element. 

The electronic configuration of elements $\mathrm{P}, \mathrm{Q}, \mathrm{R} \mathrm{and} \mathrm{S}$ are given below. (Symbols not real)

 $$\begin{gathered} \mathrm{P}-2,2 \\ \mathrm{Q}-2,8,2 \\ \mathrm{R}-2,8,5 \\ \mathrm{S}-2,8 \end{gathered}$$

Which among these elements are included in the same period? 

The electronic configuration of elements $\mathrm{P}, \mathrm{Q}, \mathrm{R} \mathrm{and} \mathrm{S}$ are given below. (Symbols not real)

$$\begin{gathered} \mathrm{P}-2,2 \\ \mathrm{Q}-2,8,2 \\ \mathrm{R}-2,8,5 \\ \mathrm{S}-2,8 \end{gathered}$$

Which are those included in the same group?