EVERYDAY SCIENCE

Detailed explanation-1: -In general, atoms are most stable, least reactive, when their outermost electron shell is full. Most of the elements important in biology need eight electrons in their outermost shell in order to be stable, and this rule of thumb is known as the octet rule.

Detailed explanation-2: -When the highest occupied energy level of an atom is filled with electrons, the atom is stable and not likely to react.

Detailed explanation-3: -Atoms which have a complete shell of valence electrons tend to be chemically inert. Atoms with one or two valence electrons are highly reactive.

Detailed explanation-4: -Most atoms become stable by sharing electrons. Covalent Bond-bond that forms between atoms when they share electrons. Molecules-neutral particles formed as a result of electron sharing. Atoms can make their outer energy level stable by sharing electrons between two atoms.

Detailed explanation-5: -The rule of 8 or the Octet rule is the tendency of atoms to have eight electrons in their valence shell. Eight electrons in this final shell allow atoms to be stable and non-reactive. Noble gases, for example, are some of the most non-reactive chemical elements one can find in nature.