Periodic Table of Elements

Group 1

+ alkaline metals
+ low melting/boiling/densities
+ reactivity decreases down the group
+ react with halogen/oxygen/hydrogen/water
+ groups form ionic bonding

Transition Elements

+ form complex ions
+ different oxidation number
+ high melting/boiling/density
+ act as a catalyst

Group 17

+ known as halogens(diatomic)
+ all non-metals
+ reactivity decreases down the group
+ react with water/hydroxide/iron/phosphorus
+ oxidizing agents decreases down the group

Group 18 

+ monoatomic gases
+ unreactive(stable)
+ low melting/boiling/density
+ cannot conduct heat/electricity
+ insoluble in water