Changes

==Definition of terms==

==Definition of terms==

;Homologous series: These are families of organic compounds with some common properties in common which are general method of preparation, similar chemical properties, general molecular formula, their physical properties changes as the relative molecular mass increases, each member differ from one another by a CH2 group and each member is named homologue.  

;Homologous series: Families of organic compounds with some common properties: general method of preparation, similar chemical properties, general molecular formula, their physical properties changes as the relative molecular mass increases, each member differ from one another by a CH2 group and each member is named homologue.  

;Homologue: This is a member of an homologous series e.g methane of alkane series, ethene of alkene series and propyne of alkyne series.  

;Homologue: Member of an homologous series e.g methane of alkane series, ethene of alkene series and propyne of alkyne series.  

;Sigma bond: These are covalent bonds formed as a result of linear overlap or head to head overlap of atomic orbitals. Compounds with sigma bonds are less reactive. E.g, S+S, Px + S, Px + Px, etc.  

;Sigma bond: These are covalent bonds formed as a result of linear overlap or head to head overlap of atomic orbitals. Compounds with sigma bonds are less reactive. E.g., S+S, Px + S, Px + Px, etc.  

;Pi-bond: These are covalent bonds formed as a result of parallel or side by side overlapp of atomic orbitals. Compounds with pi-bonds are reactive. E.g Pz + Pz, Py + Py, etc.

;Pi-bond: These are covalent bonds formed as a result of parallel or side by side overlap of atomic orbitals. Compounds with pi-bonds are reactive. E.g., Pz + Pz, Py + Py, etc.

==References==

==References==