Make a simple sketch of the shape of the main part of the periodic table, as shown.
(a) Ignoring H and He, write a single straight arrow from the element with the smallest bonding atomic radius to the element with the largest.
(b) Ignoring H and He, write a single straight arrow from the element with the smallest first ionization energy to the element with the largest.
(c) What significant observation can you make from the arrows you drew in parts (a) and (b)?