Question:
In which of the following, the elements Al, B, Mg and K are correctly arranged in the increasing order of their metallic character?
In which of the following, the elements Al, B, Mg and K are correctly arranged in the increasing order of their metallic character?
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Metallic character increases towards the left and downward in the periodic table because atoms lose electrons more easily in those directions.
Updated On: Jun 24, 2026
- \(B\lt Al\lt Mg\lt K\)
- \(B\lt Mg\lt Al\lt K\)
- \(Al\lt Mg\lt K\lt B\)
- \(B\lt Mg\lt K\lt Al\)
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The Correct Option is A
Solution and Explanation
Step 1: Recall the trend of metallic character.
Metallic character increases: (i) from right to left across a period and (ii) from top to bottom in a group Elements with greater tendency to lose electrons show higher metallic character.
Step 2: Analyze the given elements.
\[ B \] (Boron) is a metalloid and has the least metallic character among the given elements.
\[ Al \] (Aluminium) is a metal and is more metallic than boron.
\[ Mg \] (Magnesium) lies further left in the same period compared to aluminium, so it is more metallic than aluminium.
\[ K \] (Potassium) is an alkali metal and has the highest metallic character because it easily loses one electron.
Step 3: Arrange in increasing order.
Thus, the increasing order of metallic character is \[ B\lt Al\lt Mg\lt K \]
Step 4: Final conclusion.
Therefore, the correct arrangement is \[ \boxed{B\lt Al\lt Mg\lt K} \]
Metallic character increases: (i) from right to left across a period and (ii) from top to bottom in a group Elements with greater tendency to lose electrons show higher metallic character.
Step 2: Analyze the given elements.
\[ B \] (Boron) is a metalloid and has the least metallic character among the given elements.
\[ Al \] (Aluminium) is a metal and is more metallic than boron.
\[ Mg \] (Magnesium) lies further left in the same period compared to aluminium, so it is more metallic than aluminium.
\[ K \] (Potassium) is an alkali metal and has the highest metallic character because it easily loses one electron.
Step 3: Arrange in increasing order.
Thus, the increasing order of metallic character is \[ B\lt Al\lt Mg\lt K \]
Step 4: Final conclusion.
Therefore, the correct arrangement is \[ \boxed{B\lt Al\lt Mg\lt K} \]
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