Here's why:

* Beryllium (Be) is a metal and forms a positive ion (Be²⁺).

* Fluorine (F) is a nonmetal and forms a negative ion (F⁻).

* When they combine, the charges balance out, leading to the formula BeF₂.

* The naming convention for ionic compounds involves stating the cation (metal) first, followed by the anion (nonmetal) with the ending changed to "-ide".

Therefore, the correct name for BeF is beryllium fluoride.