Legislative size is a trade off between efficiency and representation; the smaller the legislature, the more efficiently it can operate, but the larger the legislature, the better it can represent the political diversity of its constituents.
The most chemically reactive metals are the alkali metals. Francium is the most reactive of these and of all metal (although it is present on earth only in exceedingly small q â¦ uantities, due to its radioactivity). The most reactive element available in useful quantities in Flourine.
Similarly 13th group is Boron family, the 14th is carbon family, 15th is nitrogen family, 16th is oxygen family and 17th is commonly known as halogen family. These groups are known with their 1st element of the group.