Question

The incorrect decreasing order of atomic radii is:

• A. \( Mg}>Al}>C}>O} \)
• B. \( Al}>B}>N}>F} \)
• C. \( Be}>Mg}>Al}>Si} \)
• D. \( Si}>P}>Cl}>F} \)

Hint:

Remember, atomic radius decreases across periods and increases down groups in the periodic table.

Answer 1

The Correct Option is C

The atomic radius decreases across a period from left to right due to the increase in effective nuclear charge, but increases down a group due to the addition of electron shells. Step 1: \( Be}>Mg}>Al}>Si} \) is incorrect because atomic radius decreases as we move from \( Be} \) to \( Si} \). Final Conclusion: The incorrect order is Option (3), \( Be}>Mg}>Al}>Si} \).