Molecules of an Element

Molecules of an Element

1. Introduction
   1. A molecule of an element is created when atoms of the same kind join together. It is the smallest part of an element that still shows its chemical characteristics.
2. Monoatomic Molecules
   1. Some elements, like Helium (He) and Argon (Ar), form molecules that contain only one atom.
   2. These are called monoatomic molecules.
   3. Example: Helium (He), Argon (Ar)
3. Diatomic Molecules
   1. Most non-metal elements do not exist as monoatomic molecules.
   2. Instead, their molecules consist of two atoms.
   3. Example: Oxygen (O₂) – a molecule of oxygen contains two oxygen atoms.
   4. These are known as diatomic molecules.
4. Ozone (O₃)
   1. In some cases, three oxygen atoms combine instead of two, forming ozone (O₃).
5. Atomicity
   1. Atomicity is the count of atoms that make up a single molecule.
   2. Examples:
      1. O₂ → Atomicity 2
      2. O₃ → Atomicity 3
      3. He → Atomicity 1
6. Metals and Other Elements
   1. Some elements, such as metals and carbon, do not form simple molecules.
   2. Their atoms are bonded together in large and indefinite structures, making their molecular composition complex.

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