Which of the following elements of IIA group has greater metallic radius (pm)?
Correct answer: D. Sr
- A. Be
- B. Mg
- C. Ca
- D. Sr
Explanation
Among Group IIA elements, the metallic radius generally increases as you move down the group. Since strontium (Sr) is located lower in the group than calcium and all the other elements listed, it has the largest metallic radius. This makes option D, Sr, the correct answer. Beryllium, magnesium, and calcium have smaller metallic radii compared to strontium, making them incorrect choices.
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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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