📝 Multiple Choice Question
General-science
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
Explanation
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.
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