What is the octet rule for molecules?
The octet rule states that atoms with an atomic number below 20 tend to combine so that they each have eight electrons in their valence shells, which gives them the same electronic configuration as a noble gas.
What is octet rule with example?
In chemistry, the octet rule explains how atoms of different elements combine to form molecules. In a chemical formula, the octet rule strongly governs the number of atoms for each element in a molecule; for example, calcium fluoride is CaF2 because two fluorine atoms and one calcium satisfy the rule.
What is the octet rule in chemistry simple?
The octet rule is a chemical rule of thumb that reflects the theory that main-group elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.
Why do we use octet rule?
The octet rule is important in covalent bonding because sharing electrons gives both atoms a full valence shell. All atoms strive to achieve a full valence shell, just like the noble gases. This is the most stable electron arrangement. Thus, each atom has eight valence electrons, a stable noble gas configuration.
How will you apply octet rule in the molecular covalent compounds?
The Octet Rule requires all atoms in a molecule to have 8 valence electrons–either by sharing, losing or gaining electrons–to become stable. For Covalent bonds, atoms tend to share their electrons with each other to satisfy the Octet Rule.
Why do atoms need 8 valence electrons?
A complete octet is very stable because all orbitals will be full. Atoms with greater stability have less energy, so a reaction that increases the stability of the atoms will release energy in the form of heat or light. A stable arrangement is attended when the atom is surrounded by eight electrons.
Which molecule does not follow the octet rule?
The two elements that most commonly fail to complete an octet are boron and aluminium; they both readily form compounds in which they have six valence electrons, rather than the usual eight predicted by the octet rule.
How do you follow the octet rule?
There are two ways in which atoms can satisfy the octet rule. One way is by sharing their valence electrons with other atoms. The second way is by transferring valence electrons from one atom to another.
What does octet rule explain?
The octet rule states that atoms tend to form compounds in ways that give them eight valence electrons and thus the electron configuration of a noble gas. Atoms of metals tend to lose all of their valence electrons, which leaves them with an octet from the next lowest principal energy level.
How is the octet rule used?
The octet rule refers to the tendency of atoms to prefer to have eight electrons in the valence shell. When atoms have fewer than eight electrons, they tend to react and form more stable compounds.