Types of molecules of elements and compounds.

 Molecules are the building blocks of matter, and they come in two main types: molecules of elements and molecules of compounds. Let's break them down in simple terms:

1. Molecules of Elements:
- These are made up of atoms of the same element bonded together.
- An element is a basic substance like oxygen (O2), hydrogen (H2), or nitrogen (N2).
- When two or more atoms of the same element join together, they form a molecule of that element.
- For example, in oxygen gas (O2), two oxygen atoms bond together to create an oxygen molecule.

2. Molecules of Compounds:
- These are formed when atoms of different elements combine.
- Compounds are substances like water (H2O), table salt (NaCl), or carbon dioxide (CO2).
- In compounds, the atoms are different, and they chemically join to form molecules.
- Water, for instance, consists of two hydrogen atoms and one oxygen atom bonded together (H2O).

In summary, molecules of elements are made of identical atoms, while molecules of compounds are made of different atoms. Understanding these types of molecules is crucial in chemistry because it helps explain how different substances are composed and behave.