Types of Bonds
A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bonds hold the atoms together and allow the atoms to attain Noble Gas Configuration. 3 types of chemical bonds: ionic, covalent, and metallic.
- Ionic bonding is the complete transfer of one or more valence electrons between atoms. It is a type of chemical bond that generates two oppositely charged ions.
-In ionic bonds, the metal loses electrons to become a positively charged cation, and the non-metal accepts those electrons to become a negatively charged anion.
- METAL + NONMETAL
- Characteristics of Ionic bonds: soluble, high melting point, conductible as liquid and when dissolved in water.
- Metallic bonding is the attraction between metals and the surrounding sea of electrons.
- The electrons are delocalized and form a sea of electrons. These electrons are packed together in a crystal lattice.
- METAL + METAL
- Characteristics of metallic bonds: shiny and metallic, not soluble, high melting point conductible as solid and liquid.
- Covalent bonds are the sharing of electrons between atoms.
- This type of bonding occur between 2 of the same element or elements closely arranged on periodic table. A molecule is a neutral group of atoms that are held together by covalent bonds.
- NONMETALS + NONMETALS
- Characteristics of covalent bonds: usually soluble, low melting point, conductivity is N/A.