Compound:
- A compound is a substance that contains two or more elements chemically bonded together in a fixed proportion.
- Compounds can be represented by chemical formulas that indicate the types and proportions of the constituent elements.
- Each compound has a unique set of properties that are different from the properties of its individual elements.
- Compounds can exist as solids, liquids, or gases, depending on their physical and chemical properties.
Molecule:
- A molecule is a group of atoms that are held together by chemical bonds. Molecules can be composed of the same type of atom, such as oxygen (O2), or different types of atoms, such as water (H2O).
- Molecules are the smallest units of a compound that retain the chemical properties of the compound.
- Molecules can be bonded together to form larger structures, such as crystals, polymers, and biological macromolecules.
The key difference between a compound and a molecule is that a compound is a specific chemical substance, while a molecule is a basic unit of matter that can exist independently or as a part of a compound. All compounds are composed of molecules, but not all molecules are compounds. For example, oxygen (O2) is a molecule but not a compound because it is composed of only one type of atom.
In summary, compounds are substances composed of two or more elements chemically bonded together, while molecules are groups of atoms held together by chemical bonds. Molecules can form compounds when different types of atoms are combined in specific proportions.
