Why do atomic radii decrease from left to right across a period of periodic tabl

Question

Why do atomic radii decrease from left to right across a period of periodic table? Atomic radii decrease from left to right across a period because the total number of electrons on the electron shell increases Atomic radii decrease from left to right across a period because the total number of electrons on the electron shell decreases Atomic radii decrease from left to right across a period because the effective nuclear charge decreases Atomic radii decrease from left to right across a period because the effective nuclear charge increases

Explanation / Answer

From left to right across the period the electronegativity increases. So, effective nuclear charge increase.

The atomic radii decreses from left to right aross the period because the effective nuclear charge increases.

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