Question

Define atomic size or atomic radius?

Answer 1

• The modern periodic table is an arrangement of all the elements known by their increasing atomic number and recurring chemical properties.
• It is a tabular display of 118 chemical elements which consists of horizontal rows called periods and vertical columns are called groups.
• Atomic size is the distance between the center of the nucleus of an atom and its outermost shell.
• The atomic radius decreases as we move from left to right in a period and it increases when we go down a group.