oktettirajoitusta
Oktettirajoitus, also known as the octet rule, is a principle in chemistry that describes the tendency of atoms to gain, lose, or share electrons to achieve a full outer electron shell, typically containing eight valence electrons. This configuration, resembling that of noble gases, is energetically favorable and leads to chemical stability.
The octet rule is particularly applicable to elements in the second period of the periodic table, such
However, the octet rule is not universally applicable. Elements in later periods, especially those in the third
There are also exceptions where atoms can achieve stability with fewer than eight valence electrons, such as