Generally, the atomic size along a period gradually decreases due to increase in _____________.

The atomic radius decrease in a period due to

Increase in atomic size down the group is due to increase in

The atomic radius decreases in a period due to

The size of pupil decreases due to the contraction of

The size of pupil decreases due to the contraction of

The size of pupil decreases due to the contraction of

Fill in the blanks with the appropriate word/s Atomic size across a period ______ [increases/decreases] with increase in nuclear charge of the element.

Describe the trend of atomic size along a period and a group in the periodic table.