* Hydrogen atom: This is a single hydrogen atom, represented by the symbol H. It consists of one proton and one electron.
* Hydrogen molecule: This is the most common form of hydrogen found in nature, represented by the symbol H₂. It consists of two hydrogen atoms bonded together.
So, when people talk about "hydrogen," they usually mean the hydrogen molecule (H₂) .
It's important to remember this distinction as it affects many chemical reactions and properties. For example, hydrogen atoms are highly reactive, while hydrogen molecules are relatively stable.
