In the row of periodic table, the atomic radii from Na to Cl

Question

In the  row of periodic table, the atomic radii from Na to Cl

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Strategy:
 Atomic radius trends are governed by the effective nuclear charge ().

Step 1: Analyze Period 3 (Na to Cl)
Elements: .
- As we proceed from Sodium to Chlorine, the atomic number (number of protons) increases.
- The electrons are added to the same main shell ().
- Shielding by inner electrons remains relatively constant, while the nuclear attraction increases ( rises).
- This results in the outer electrons being pulled closer to the nucleus.

Step 2: Conclusion
The atomic radius decrea

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