The correct order of atomic radii is:
Correct answer: B. F<LI<Na<K
- A. F<K<Li
- B. F<LI<Na<K
- C. Li<Na<K<F
- D. Na<K<Li<F
Explanation
The correct order of atomic radii is F < Li < Na < K. Fluorine (F) has the smallest atomic radius due to its position on the extreme right side of the periodic table. On the other hand, lithium (Li), sodium (Na), and potassium (K) are alkali metals with increasing atomic radii down the group. Therefore, the correct order is F < Li < Na < K. The incorrect options either reverse the order or place elements incorrectly based on their positions in the periodic table.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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