An element X (atomic number 17) reacts with an element Y (atomic number 20) to form a divalent halide.
Draw the electron dot structure of the divalent halide.

Explanation

To solve the problem of drawing the electron dot structure of the divalent halide formed by elements X and Y, we will follow these steps:

### Step 1: Identify the Elements
- Element X has an atomic number of 17, which corresponds to Chlorine (Cl).
- Element Y has an atomic number of 20, which corresponds to Calcium (Ca).

### Step 2: Determine the Divalent Halide
- Calcium (Ca) can form a divalent cation (Ca²⁺) because it has two valence electrons that it can lose.
...