Bonding in Carbon - The Covalent Bond

Atomic numbers of three elements X, Y and Z are $11$, $16$ and $15$ respectively.
(a) Write down the molecular formula of the compound formed by elements ‘X’ and ‘Y’.
(b) Explain the bonding of other compounds formed.
 

Draw the possible isomers of the compound with molecular formula ${\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}$ and also give their electron dot structures.

Illustrate the formation of nitrogen molecule using an electron dot diagram.

What type of bonds are present in ${\mathrm{N}}_2$ and ${\mathrm{O}}_2$ molecules?

Show the formation of a triple covalent bond in ethyne molecule by drawing its electron dot structure.

Show the formation of a double covalent bond in ethene molecule by drawing its electron dot structure.

Draw the electron dot structure of ethyne undefined.

Draw the electron dot structure of ethene undefined.

Draw the electron dot structure of ethane, ${\mathrm{C}}_2{\mathrm{H}}_6$.

Draw the electron dot structure of methane, ${\mathrm{CH}}_4$.

How many single covalent bonds are present in an ethane molecule?
(Choose anyone of them: Six/ One/ Seven).

Why is $\mathrm{C}-\mathrm{C}$ very strong?

What type of chemical bonds are formed by carbon?

Why is carbon tetravalent?

How can carbon atom acquire noble gas electronic configuration?

State the reason why carbon can neither form ${\mathrm{C}}^{4+}$ cations nor ${\mathrm{C}}^{4-}$  anions, but forms covalent compounds?

Write the electronic configuration of carbon.