2.6 Ionic and Molecular Compounds

Using the periodic table, predict whether the following chlorides are ionic or covalent: KCl, NCl₃, ICl, MgCl₂, PCl₅, and CCl₄.

For each of the following compounds, state whether it is ionic or covalent. If it is ionic, write the symbols for the ions involved:

(a) NF₃

(b) BaO

(c) (NH₄)₂CO₃

(d) Sr(H₂PO₄)₂

(e) IBr

(f) Na₂O

For each of the following pairs of ions, write the formula of the compound they will form:

(a) Ca²⁺, S²⁻

(b) $\text{NH}_{4} ^{+} ,$ $\text{SO}_{4} ^{2−}$

(c) Al³⁺, Br⁻

(d) Na⁺, $\text{HPO}_{4} ^{2−}$

(e) Mg²⁺, $\text{PO}_{4} ^{3−}$