Properties of Ionic and Covalent Compounds Ionic and covalent compounds are two broad categories of compounds based on their bonding characteristics. Ioni...
Ionic and covalent compounds are two broad categories of compounds based on their bonding characteristics.
Ionic compounds are formed when one or more atoms lose or gain electrons to achieve a stable electronic configuration. This can occur when atoms with different valences form ionic bonds with atoms with lower valences. Some common ionic compounds include:
NaCl (sodium chloride) - A compound made of sodium atoms and chloride ions (Cl-).
CaF2 (calcium fluoride) - A compound composed of calcium atoms and fluoride ions (F-).
BaSO4 (Barium sulfate) - A compound formed by barium atoms and sulfate ions (SO42-).
Covalent compounds are held together by strong covalent bonds, which are characterized by the sharing of electron pairs. These bonds can be formed when atoms form atomic orbitals that overlap, or when atoms share valence electrons to achieve a stable electron configuration. Some common covalent compounds include:
Diamond - A pure, single-atom crystal composed of carbon atoms arranged in a hexagonal lattice.
Water - A covalent compound composed of hydrogen and oxygen atoms that form hydrogen bonds with each other.
Glucose - A covalent compound composed of carbon, hydrogen, and oxygen atoms that forms covalent bonds with each other.
Key differences between ionic and covalent compounds:
| Feature | Ionic | Covalent |
|---|---|---|
| Bonding | Electrostatic attraction between oppositely charged ions | Covalent bonding through sharing of electron pairs |
| Charge distribution | Charges are distributed throughout the compound | Charges are concentrated within specific atoms |
| Physical properties | Typically have high melting and boiling points | Typically have high melting and boiling points |
| Chemical properties | Often conduct electricity when molten or dissolved | Usually do not conduct electricity |
| Examples | NaCl, CaF2, BaSO4 | Diamond, water, glucose |
Remember: The properties of ionic and covalent compounds can vary depending on the specific atoms involved and the bonding mechanisms present