Arrange the following which is most reactive to the least reactive when these react in water:
sodium
lithium
potassium

Potassium is the most reactive

Then comes the Sodium

Lithium is the least reactive

Explanation:

For detailed explanation and understanding please see the attachment.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.