Divalent carbon species called carbenes are capable of fleeting existence. For example, methylene, :CH2, is the simplest carbene. The two unshared electrons in methylene can be either paired in a single orbital or unpaired in different orbitals.        
a. Identify the type of hybridization you expect carbon to adopt in singlet (spin-paired) methylene and draw an illustration of its orbital showing the location of its electrons.  (4 marks) b. Identify the type of hybridization you expect carbon to adopt in triplet (spin-unpaired) methylene and draw an illustration of its orbital showing the location of its electrons.