* Octet Rule: Atoms strive to have a full outer shell of electrons for stability. Hydrogen only needs two electrons in its outer shell (it only has one), while oxygen needs eight.
* Sharing Electrons: To achieve this stability, hydrogen and oxygen atoms share electrons with another atom of the same element.
* Covalent Bonding: The sharing of electrons forms a strong covalent bond between two hydrogen atoms (H₂), and between two oxygen atoms (O₂).
In simpler terms:
* Hydrogen atoms are "lonely" with just one electron. By sharing an electron with another hydrogen atom, they both "think" they have two electrons, making them happy (stable).
* Oxygen atoms have six electrons in their outer shell. By sharing two electrons with another oxygen atom, they both "think" they have eight electrons, making them happy.
Therefore, hydrogen and oxygen naturally exist as diatomic molecules, H₂ and O₂ respectively, because it is the most stable configuration for these elements.
