Which sequence correctly ranks elements from largest to smallest atomic radius?

Br, As, K

Cs, Ba, At

F, S, As

Mg, Ca, Ba

the maximum mass of nh3 is nh3 in grams

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.

it's c (engineer's do their work with mechanical stuff not on any living being)