Which of the following has the least metallic character?

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answer is A.

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Detailed Solution

Concept- The metallic character of the elements present in the periodic table varies. Along the periods, the metallic character from left to right decreases and along the group from top to bottom the metallic character increases.
Transition metals exhibit typical metallic characteristics because they have low ionisation energy and a number of open orbitals in their outermost shell, which facilitate the development of metallic bonds in these substances. The contemporary periodic table also shows that when an element moves from left to right throughout a period, its metallic nature weakens. This is due to the fact that when an atom's protons and electrons rise, the nuclear force acting on the electrons also increases, making it harder to lose electrons. In contrast, as an atom moves down the group, the metallic character increases. This is due to the fact that when atomic radius grows, losing electrons gets simpler.
So, C has the least metallic character and Sn has the highest metallic character.
Hence, the correct answer is option 1.

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