Draw the structure of (a) `BeCl_(2)`(vapour) and (b) `BeCl_(2)` (solid).

Explanation

To draw the structures of BeCl₂ in both vapor and solid states, we need to understand the bonding and arrangement of atoms in each state.

### Step-by-Step Solution:

#### (a) Structure of BeCl₂ in Vapor State:
1. **Identify the Hybridization**: Beryllium (Be) in BeCl₂ undergoes sp hybridization. This means that one s orbital and one p orbital from beryllium mix to form two equivalent sp hybrid orbitals.
2. **Bonding with Chlorine**: Each sp hybrid orbital of beryllium forms a sigma bond with a chlorine atom. Thus, beryllium is bonded to two chlorine atoms.
3. **Molecular Geometry**: In the vapor state, BeCl₂ exists as a linear molecule due to the sp hybridization. The bond angle between the Cl-Be-Cl is 180°.
...