Question

question #2 of 6
which of the following compounds contains a covalent bond?
nacl
mgo
h₂o
cacl₂

Explanation:

Covalent bonds form between non - metals by sharing electrons. In $H_2O$, hydrogen and oxygen are non - metals and share electrons to form covalent bonds. $NaCl$, $MgO$, and $CaCl_2$ are ionic compounds formed by the transfer of electrons between metals and non - metals.

Answer:

$H_2O$