Ionic Bonds:
In ionic bonds, the electron pair is completely transferred from one atom to another, resulting in the formation of positively charged ions (cations) and negatively charged ions (anions). The electrostatic attraction between these oppositely charged ions holds the ionic compound together.
Characteristics of Ionic Bonds:
- Involve a complete transfer of electrons.
- Result in the formation of ions.
- Strong electrostatic attraction between ions.
- Typically formed between a metal and a non-metal.
- Compounds are crystalline solids at room temperature.
- Generally soluble in polar solvents like water.
Covalent Bonds:
In covalent bonds, electrons are shared between atoms without complete transfer. The shared electron pair forms a region of high electron density between the bonded atoms, creating a stable molecular structure.
Characteristics of Covalent Bonds:
- Involves the sharing of electron pairs.
- Does not result in the formation of ions.
- Strength depends on the number of shared electron pairs.
- Typically formed between non-metals.
- Can be polar or nonpolar depending on electronegativity differences.
- Compounds can exist as gases, liquids, or solids at room temperature.
- Generally insoluble in polar solvents but soluble in nonpolar solvents.
