Question

in which of the following compounds are atoms held together by covalent bonds involving pairs of electrons shared between atoms? (pick all that apply)
□ k₂s
□ no₂
□ c₆h₁₂o₆
□ h₂o
□ pcl₅
□ ag₂o
□ nacl
□ mg₃n₂

Explanation:

Covalent bonds form between non - metals by sharing electron pairs. $K_2S$ is an ionic compound with a metal (K) and non - metal (S). $NO_2$ is a covalent compound with non - metals N and O sharing electrons. $C_6H_{12}O_6$ (glucose) has only non - metals (C, H, O) and has covalent bonds. $H_2O$ has non - metals H and O with covalent bonds. $PCl_5$ has non - metals P and Cl with covalent bonds. $Ag_2O$ is an ionic compound with a metal (Ag) and non - metal (O). $NaCl$ is an ionic compound with a metal (Na) and non - metal (Cl). $Mg_3N_2$ is an ionic compound with a metal (Mg) and non - metal (N).

Answer:

B. $NO_2$
C. $C_6H_{12}O_6$
D. $H_2O$
E. $PCl_5$