1. Lewis Structure:
- This uses dots to represent valence electrons and lines to represent shared electron pairs. A single line represents a single covalent bond.
Example: H - H (for the hydrogen molecule)
2. Structural Formula:
- This uses lines to represent bonds, but omits the dots for valence electrons.
Example: H-H (for the hydrogen molecule)
3. Condensed Structural Formula:
- This omits most or all of the lines representing bonds and instead shows the atoms in a sequence, often with parentheses indicating branching.
Example: H₂ (for the hydrogen molecule)
4. Ball-and-stick Model:
- This uses spheres to represent atoms and sticks to represent bonds. The length of the stick indicates the bond length.
5. Space-filling Model:
- This shows the atoms as spheres that touch, representing the actual shape of the molecule. The size of the spheres represents the atomic radius.
Note:
- The specific representation used depends on the context and the desired level of detail. Lewis structures are often used for simple molecules, while more complex molecules may be represented using structural formulas or models.
