Question

The following elements belong to the same group of periodic table. (Letters do not represent the actual symbols)

element	Atomic radius (nm)	lonic radius (nm)	First ionization (KJ mol-1)
P	0.137	0.066	736
Q	0.089	0.031	900
R	0.174	0.099	590

1. State whether the elements are metals or non-metals. Explain your answer. 
2. Which element is the most reactive? Explain.   

Answer 1

1. Metals
   They have smaller ionic radius than atomic radius
2. R
   It has largest atomic radius hence lose electrons most easily