Which of the following compounds results from the formation of an ionic bond?

h2o
no2
nacl
cO2

NaCl

The compound that results from the formation of an ionic bond is NaCl (sodium chloride).

To determine which of the following compounds results from the formation of an ionic bond, we need to understand what an ionic bond is.

An ionic bond is a type of chemical bond that occurs between a metal and a non-metal. In an ionic bond, electrons are transferred from the metal atom to the non-metal atom, resulting in the formation of positively charged cations and negatively charged anions. These oppositely charged ions then attract each other, forming a stable compound.

Let's analyze each compound in the given list:

- H2O (water) is a covalent compound. It forms when two hydrogen atoms share their electrons with an oxygen atom, creating a covalent bond.
- NO2 (nitrogen dioxide) is also a covalent compound. It consists of two nitrogen atoms and one oxygen atom, connected by covalent bonds.
- NaCl (sodium chloride) is the compound that results from the formation of an ionic bond. It is composed of sodium (Na) and chlorine (Cl) atoms. Sodium loses an electron to form Na+, while chlorine accepts that electron to form Cl-. The resulting positive and negative ions are attracted to each other, creating the ionic bond in sodium chloride.
- CO2 (carbon dioxide) is a covalent compound as well. It is made up of one carbon atom and two oxygen atoms, bonded through covalent bonds.

Therefore, the compound resulting from the formation of an ionic bond is NaCl (sodium chloride).