Question

The elements Be, Mg and Ca each having two electrons in their outermost shells are in periods 2,3&4 respectively of the Modern Periodic Table. Now, answer the following questions, giving justifications in each case :1write the group to which these elements belong 2Name the least reactive elements 3Name the elements having largest atomic radius

Answer 1

1.Be-2nd group

Mg-2nd group

Ca-2nd group

2.Be is the least reactive.

3.Ca has largest atomic radius among the following.