1. Elements:
- Elements are the most fundamental and basic units of matter.
- They consist of only one type of atom and cannot be broken down into simpler substances by chemical means.
- Each element is identified by its unique chemical symbol, which is a one or two-letter abbreviation.
- Examples of elements include hydrogen (H), oxygen (O), iron (Fe), gold (Au), and so on.
2. Compounds:
- Compounds are substances formed by the chemical combination of two or more elements in definite proportions by mass.
- They are composed of two or more different types of atoms chemically bonded together.
- Compounds have different properties and compositions compared to the elements they are composed of.
- Examples of compounds include water (H2O), carbon dioxide (CO2), table salt (NaCl), sugar (C12H22O11), and so on.
In summary, elements are pure substances made up of only one type of atom, while compounds are pure substances formed by the chemical union of two or more different elements.
