The number of σσσσσσσσσσ bonds, π bonds and lone pair of electrons in pyridine, respectively are:

Pyridine is a heterocyclic aromatic compound, similar to benzene but with one CH group replaced by a nitrogen atom.

Step 1: Draw the Lewis structure of pyridine. You will see that it has a hexagonal ring with 5 carbon atoms and 1 nitrogen atom. Each carbon atom is bonded to one hydrogen atom.

Step 2: Count the sigma (σ) bonds. Each bond between two atoms consists of one sigma bond. So, in pyridine, there are 6 σ bonds in the ring (between the carbon and nitrogen atoms), and 5 σ bonds between the carbon and hydrogen atoms. Therefore, there are a total of 11 σ bonds.

Step 3: Count the pi (π) bonds. In pyridine, there are alternating double bonds in the ring. Each double bond consists of one sigma bond and one pi bond. Therefore, there are 3 π bonds in pyridine.

Step 4: Count the lone pairs of electrons. The nitrogen atom in pyridine has one lone pair of electrons.

So, in pyridine, there are 11 σ bonds, 3 π bonds, and 1 lone pair of electrons.