alkenes.

Question 1

what does a saturated alkene get displayed like?

Answer 1

C-C only.

Question 2

what does an unsaturated alkene get displayed like?

Answer 2

C=C

Question 3

what are alkenes?

Answer 3

homogous series of unsaturated hydrocarbons.
hydrocarbons with the general formula CnH2n.

Question 4

what is the molecular formula for: ethene, propene, butene, pentene.

Answer 4

C₂H₄.
C₃H₆.
C₄H₈.
C₅H₁₀.

Question 5

what are the reaction of alkenes and why?

Answer 5

very reactive due to presence of the C=C double bond which undergoes addition reaction. addition reactions the C=C bond becomes a C-C single bond and other atoms join onto C atoms.
alkenes also burn. too valuable for making polymers and tends to undergo incomplete combustion with Smokey flames.