Given below are atomic radii of same elements of second period. {:("Element","B","O","N","C"),("Atomic Radii in pm","88","66","74","77"):} Arrange these elements in the increasing order of their atomic number. Give reason for your answer.

Given below are atomic radii of same elements of second period. {:("E

1.	Given below are atomic radii of same elements of second period. {:("Element","B","O","N","C"),("Atomic Radii in pm","88","66","74","77"):} Arrange these elements in the increasing order of their atomic number. Give reason for your answer.
Answer» SOLUTION :B, C, N, O. In a period, as the atomic number increases, SIZE of the atom decreases. This is because increase in NUCLEAR charge tends to pull electrons closer to nucleus and reduces the size of the atom.