The correct order of metallic character is

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AIIMS BSc NURSING 2023 Memory-Based Paper

Answer 1

CONCEPT:

Metallic Character

Metallic character refers to the ability of an element to lose electrons and form positive ions (cations).
Elements with higher metallic character are generally found on the left side of the periodic table and towards the bottom.
Metallic character increases down a group and decreases across a period from left to right.

EXPLANATION:

Potassium (K) is in Group 1, which has the highest metallic character.
- Magnesium (Mg) is in Group 2, which also has high metallic character but less than Group 1.
- Aluminum (Al) is in Group 13, which has moderate metallic character.
- Boron (B) is in Group 13, but it is a metalloid with much lower metallic character compared to Al.
Considering the position in the periodic table and the trend of metallic character:
- K has the highest metallic character.
- Mg has less metallic character than K but more than Al.
- Al has less metallic character than Mg but more than B.
- B has the lowest metallic character among the given elements.

Therefore, the correct order of metallic character is: K > Mg > Al > B.