* Metals are elements that typically lose electrons to form positively charged ions (cations).

* Binary ionic compounds are formed by the electrostatic attraction between a positively charged metal ion (cation) and a negatively charged non-metal ion (anion).

Examples of binary ionic compounds:

* Sodium chloride (NaCl): Sodium (Na) is a metal, and chlorine (Cl) is a non-metal.

* Magnesium oxide (MgO): Magnesium (Mg) is a metal, and oxygen (O) is a non-metal.

Key takeaway: Binary ionic compounds contain both metals and non-metals. They are not metals themselves.