ionic model

Cation

A positively charged ion formed when an atom loses electrons.

Anion

A negatively charged ion formed when an atom gains electrons.

Isoelectronic Species

Ions that have the same number of electrons as a noble gas.

Ionic Bond

The electrostatic attraction between oppositely charged ions.

Giant Ionic Lattice

A 3D structure where ions are arranged in a regular repeating pattern.

Lattice Enthalpy (ΔHₗₑ)

The energy released when one mole of an ionic compound forms from its gaseous ions.

Neutral Ionic Compound

An ionic compound where the total positive and negative charges balance to zero.

Melting Point of Ionic Compounds

Ionic compounds have high melting and boiling points due to strong electrostatic forces.

Solubility of Ionic Compounds

Ionic compounds are soluble in water due to hydration, where water surrounds ions.

Conductivity of Ionic Compounds

Ionic compounds do not conduct electricity as solids, but do when molten or dissolved.

Criss-Cross Method

A technique used to determine the formula of an ionic compound by swapping the charges of the ions.

Factors affecting Ionic Bond strength

Charge of ions and size of ions; higher charge and smaller size lead to stronger bonds.

NaCl

An ionic compound resulting from the combination of sodium ions (Na⁺) and chloride ions (Cl⁻).

MgO

An ionic compound formed by magnesium ions (Mg²⁺) and oxide ions (O²⁻), noted for stronger bonds than NaCl.