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ionic bonding lattice
A LevelChemistry~4 min read
Overview
This lesson explores ionic bonding, a fundamental type of chemical bond formed by electrostatic attraction between oppositely charged ions. We will delve into how these ions are formed, the characteristics of the resulting ionic compounds, and the ordered arrangement of ions in crystal lattices.
Formation of Ionic Bonds
Ionic bonds typically form between **metals** (Groups 1, 2, and some 13) and **non-metals** (Groups 16, 17). Metals tend to **lose valence electrons** to achieve a stable noble gas electron configuration, forming **positively charged cations**. For example, sodium (Na) loses one electron to become N...
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Key Concepts
- Ionic Bond: The electrostatic force of attraction between oppositely charged ions, formed by the transfer of electrons.
- Cation: A positively charged ion, formed when an atom loses one or more electrons.
- Anion: A negatively charged ion, formed when an atom gains one or more electrons.
- Octet Rule: The tendency of atoms to achieve a stable electron configuration with eight valence electrons (or two for hydrogen/helium).
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Exam Tips
- →When drawing dot-and-cross diagrams for ionic compounds, always show the transfer of electrons, include square brackets around the ions, and clearly indicate the charges on the ions.
- →Be able to explain the properties of ionic compounds (e.g., high melting point, conductivity) in terms of the strong electrostatic forces within the crystal lattice and the mobility of ions.
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