Arrange the following elements in the increasing order of metallic character : B ,Al, Mg, K.

Explanation

To arrange the elements B (Boron), Al (Aluminum), Mg (Magnesium), and K (Potassium) in increasing order of metallic character, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Metallic Character**: Metallic character refers to the tendency of an element to lose electrons and form positive ions. The more readily an element loses its electrons, the more metallic it is.

2. **Periodic Trends**:
- As we move down a group in the periodic table, metallic character increases because the atomic size increases, making it easier for the outermost electrons to be lost.
...