JKSSB Mock Tests

In the periodic table, what is the trend for atomic radius as you move from left to right across a period (horizontal row)?

A. Atomic radius remains constant
B. Atomic radius decreases
C. Atomic radius exhibits irregular behaviour
D. Atomic radius increases
Answer: Option B
Solution (By JKSSB Mock Tests Team)
As you move from left to right across a period, the atomic number increases, adding more protons to the nucleus. This creates a stronger effective nuclear charge that pulls the electron cloud closer, thereby decreasing the atomic radius.
This Question Belongs to: General science Chemistry set 1
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