All the elements, on the basis of long form of periodic table, can be divided into four blocks, *s, p, d* and *f*. The ionization energies, electron affinities, electronegativities, atomic and ionic radii and other physical properties usually show a regular pattern of change within a group or along period with some irregularities.
On moving from Li to F in the second period, there would be a decrease in:
a. non-metallic property
b. atomic radius
c. ionization potential
d. electronegativity