Carbon,a Group $14$ element in the Periodic Table,is known to form compounds with many elements. Write an example of a compound formed with:
$(a)$ Chlorine (Group $17$ of Periodic Table)
$(b)$ Oxygen (Group $16$ of Periodic Table)

An element $X$ of group $15$ exists as a diatomic molecule and combines with hydrogen at $773 \, K$ in the presence of a catalyst to form a compound,ammonia,which has a characteristic pungent smell.
$(a)$ Identify the element $X$. How many valence electrons does it have?
$(b)$ Draw the electron dot structure of the diatomic molecule of $X$. What type of bond is formed in it?
$(c)$ Draw the electron dot structure for ammonia and what type of bond is formed in it?

Carbon has four electrons in its valence shell. How does carbon attain stable electronic configuration?

What would be the electron dot structure of a molecule of sulphur which is made up of eight atoms of sulphur?

Which element forms the basis of components like vitamins,proteins,and carbohydrates?

Ethane,with the molecular formula $C_{2}H_{6}$,has