What is octet and Duplet rule?

Active atoms tend to complete the number of electrons according to octet rule or duplet rule. The key difference between octet and duplet is that octet is an atom or an ion having a maximum of eight electrons in the outermost shell while duplet is an atom having the maximum of two electrons in the outermost shell.

What is the duet rule in chemistry?

The duet rule states that hydrogen and helium may have no more than two electrons in their valence shells. The rule comes from quantum mechanics, which says that the lowest energy level (n = 1) of an atom can contain only two electrons. The duet rule is also known as Octet rule.

Which elements can break the octet rule?

Hydrogen, beryllium, and boron have too few electrons to form an octet. Hydrogen has only one valence electron and only one place to form a bond with another atom. Beryllium has only two valence atoms, and can form only electron pair bonds in two locations.

What is the duet rule and which elements does it apply to?

Duplet rule states that an element is stable if its atom has 2 electrons in its valence shell and to attain this state, elements lose, gain or share electrons and form chemical bonds. This rule is also called the duet rule. The only elements known to follow the this rule are Hydrogen, Helium and Lithium.

What is the duet rule quizlet?

Define what the duet rule is. Its a rule that says that a H atom must only have 2 electrons filling its outer orbital. Its a rule that says that the rest of the elements must have 8 electrons filling its outer level.

Does lithium follow the octet rule?

Lithium, an alkali metal with three electrons, is also an exception to the octet rule. Lithium tends to lose one electron to take on the electron configuration of the nearest noble gas, helium, leaving it with two valence electrons. There are two ways in which atoms can satisfy the octet rule.

What are the four elements that obey the duet rule?