Question
Chemistry Question on trends in periodic table
The atom of smallest atomic radius among the following is
A
Na
B
K
C
Br
D
Li
Answer
Br
Explanation
Solution
When we move from left to right in the Periodic Table, atomic radius decreases. While in a group atomic radius increases from up to down. Moreover, the radius of alkali metals is metallic radius and that of halogens is covalent radius and metallic radius > covalent radius. Thus, Br has the smallest atomic radius.