Question

select two of the following compounds that are covalent.
a. cacl₂
b. p₂o₅
c. fe₂s₃
d. mgf₂

Explanation:

Covalent compounds are formed by the sharing of electrons between non - metal atoms. In $CaCl_2$, calcium (a metal) and chlorine (a non - metal) form an ionic compound. In $P_2O_5$, both phosphorus and oxygen are non - metals and share electrons to form a covalent compound. In $Fe_2S_3$, iron (a metal) and sulfur (a non - metal) form an ionic compound. In $MgF_2$, magnesium (a metal) and fluorine (a non - metal) form an ionic compound.

Answer:

B. $P_2O_5$