2. Atoms and the Periodic Table

Which alkaline earth metal has the smallest atomic radius? 

Which alkaline earth metal has the largest atomic radius?

Arrange the following atoms in order of decreasing atomic radius:Sr, Se, Ne, Ga

Give the symbol of the element that has the

b. largest atomic size in Period 4

Give the symbol of the element that has the

a. largest atomic size in Group 1A (1)