Element X forms a chloride with the formula `XCl_(2)`, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as

Options

A. Na
B. Mg
C. AI
D. Si

Explanation

To solve the question, we need to analyze the information given about element X and its chloride, XCl₂. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the formula XCl₂
The formula XCl₂ indicates that element X forms a compound with chlorine (Cl) where the ratio of X to Cl is 1:2. This means that for every one atom of X, there are two atoms of chlorine.

**Hint:** The subscript in the chemical formula indicates how many atoms of each element are present in the compound.

### Step 2: Determine the valency of chlorine
...