JEE Main · 2022 · 28 Jul 2022 · Shift 2 · Classification of Elements and Periodicity

The correct decreasing order for metallic character is

(A) $Na > Mg > Be > Si > P$ ✓ Correct
(B) $P > Si > Be > Mg > Na$
(C) $Si > P > Be > Na > Mg$
(D) $Be > Na > Mg > Si > P$

Answer: (A)

Solution

Metallic character decreases across a period (left to right) and increases down a group. Among the given elements: Na (Group 1, Period 3) has the highest metallic character, followed by Mg (Group 2, Period 3), then Be (Group 2, Period 2), then Si (Group 14, Period 3), and finally P (Group 15, Period 3) has the lowest metallic character. Therefore, the correct order is Na > Mg > Be > Si > P.

JEE Main · 2022 · 28 Jul 2022 · Shift 2 · Single correct option

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