Q. In Modern Periodic Table, the atomic radius increases:
Answer: while moving from right to left in a period
Notes: The atomic radius is defined as the shortest distance between the atom’s nuclei and the outermost shell of the atom. The atomic radii of elements vary in the periodic table in a fixed pattern. In general, atomic radius decreases as we move from left to right in a period and it increases when we go down a group. This is because in periods the valence electrons are in the same outermost shell.