Which is the smallest elemet in period 2

Dear Student,

Smallest element-Fluorine (According to atomic radii)
It has the smallest diameter in the second period.
In the same period diameter of atom depends on how many electrons are in outer layer. At the periodic table when we go from left to right, amount of electrons are rising in outer layer and the thrust between nucleus and electrons is rising too. So that's why atom on the right is smaller than atom on the left.
 Element-           Li    Be     B    C      N    O       F
 Atomic Radii - 152  111    88    77   74   66     64

According to atomic mass, smallest element in the 2nd period is Lithium, Li.


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