* Hydrogen is diatomic: Hydrogen gas exists naturally as a molecule (H₂) with two hydrogen atoms bonded together.
* Avogadro's Number: One mole of any substance contains Avogadro's number of particles (6.022 x 10²³).
* One mole of hydrogen: Therefore, one mole of hydrogen gas (H₂) contains 6.022 x 10²³ molecules of H₂, which is equal to 1.2044 x 10²⁴ hydrogen atoms.
In summary:
* A single hydrogen molecule (H₂) has two hydrogen atoms.
* One mole of hydrogen (H₂) contains 6.022 x 10²³ molecules.
* So, one mole of hydrogen contains twice the number of atoms as the number of molecules.
It's important to distinguish between the number of molecules and the number of atoms when dealing with diatomic elements.
