Question

select the correct answer. beryllium (be) and fluorine (f) combine to make the compound bef₂. what is the chemical name for this compound?
a. beryllium fluoride
b. beryllium fluorine
c. beryllide fluoride
d. beryllide fluorine

Explanation:

To name an ionic compound like \( \text{BeF}_2 \), we use the name of the metal (beryllium, which is a group 2 metal with a fixed charge of \( +2 \)) and the non - metal. The non - metal (fluorine) changes its ending to -ide. So fluorine becomes fluoride. There is no need for a Roman numeral here because beryllium has a fixed oxidation state in its compounds. Option B is incorrect because we use -ide for the non - metal, not the elemental name. Options C and D are incorrect as there is no such naming convention as “beryllide” for beryllium in ionic compound naming.

Answer:

A. beryllium fluoride