Question

which of the following will have smallest atomic radius boron ,carbon ,nitrogen ,oxygen .​

Answer 1

The one who will have the smallest radius is boron

Answer 2

$\huge\boxed{Answer}$

° As Atomic number of oxygen is 8, and by the fact atomic size decreases from going right to left of periodic table... U can have ur answer by the following

Boron - 5
Carbon- 6
Nitrogen- 7
Oxygen - 8

So,
Oxygen would have least atomic radii

$\bf{Hope\:you\:got\:it}$
$\textbf\red{Mark\:as\:brainliest}$