Arrange the given elements in the increasing order of their reactivity.
`""_(19)X^(39) , ""_(12)Y^(24) ,""_(14)W^(28)`

Explanation

To arrange the elements \( X \), \( Y \), and \( W \) in increasing order of their reactivity, we need to analyze their electronic configurations and the number of valence electrons. Here's a step-by-step solution:

### Step 1: Identify the Elements and Their Atomic Numbers
- Element \( X \) has atomic number 19.
- Element \( Y \) has atomic number 12.
- Element \( W \) has atomic number 14.

### Step 2: Determine the Electronic Configurations
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