Homologous series: (Edexcel GCSE Chemistry): Flashcards

Family of organic compounds with similar features & regular pattern

Same functional group

Same functional group causes similar reactions

By a $CH_2$ group

Methane ($CH_4$), ethane ($C_2H_6$), propane ($C_3H_8$)

Increase as molecules get larger

Larger molecules have more surface area, need more energy

$C_nH_{2n+2}$

Same molecular formula but different structural formula

Propan-1-ol and propan-2-ol

$C_3H_8O$

They have the same functional group