JEE Main · 2023 · 10 Apr 2023 · Shift 2 · Classification of Elements and Periodicity

The correct order of metallic character is:

(A) $Be > Ca > K$
(B) $Ca > K > Be$
(C) $K > Ca > Be$ ✓ Correct
(D) $K > Be > Ca$

Answer: (C)

Solution

Metallic character increases down a group (easier to lose electrons due to larger atomic size and lower ionization energy) and decreases across a period from left to right. K (Group 1, Period 4) is the most metallic, followed by Ca (Group 2, Period 4), and Be (Group 2, Period 2) is the least metallic. Order: K > Ca > Be.

JEE Main · 2023 · 10 Apr 2023 · Shift 2 · Single correct option

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