What is the formula of the compound made from beryllium and bromine?

To determine the formula of the compound made from beryllium (Be) and bromine (Br), we need to consider the charges of the ions that these elements form when they combine.

1. **Identify the Charges of the Ions**:
- **Beryllium (Be)** is an alkaline earth metal and typically forms a +2 cation (Be²⁺) because it has two electrons in its outer shell that it readily loses to achieve a stable electron configuration.
- **Bromine (Br)** is a halogen and typically forms a -1 anion (Br⁻) because it has seven electrons in its outer shell and needs one more electron to achieve a full octet.

2. **Combine the Ions**:
- To create a neutral compound, the total positive charge must balance the total negative charge.
- Since Be has a +2 charge and Br has a -1 charge, we need two bromine ions to balance one beryllium ion:
\[
\text{1 Be}^{2+} + \text{2 Br}^{-} \rightarrow \text{BeBr}_2
\]

3. **Write the Formula**:
- The formula for the compound is **BeBr₂**. This indicates that one beryllium ion combines with two bromide ions.

In conclusion, the formula of the compound made from beryllium and bromine is **BeBr₂**.