Table of Contents
What elements already have an octet?
According to the octet rule, the atoms immediately before and after neon in the periodic table (i.e. C, N, O, F, Na, Mg and Al), tend to attain a similar configuration by gaining, losing, or sharing electrons.
What family follows the octet rule?
The octet rule is only applicable to the main group elements. The molecules of the halogens, oxygen, nitrogen, and carbon are known to obey the octet rule. In general, the elements that obey this rule include the s-block elements and the p-block elements (except hydrogen, helium, and lithium).
Does group 18 have an octet?
The noble gases (Group 18) are located in the far right of the periodic table and were previously referred to as the “inert gases” due to the fact that their filled valence shells (octets) make them extremely nonreactive. The noble gases were characterized relatively late compared to other element groups.
What family has 5 valence electrons?
The elements of the group 15 (column) VA of the periodic table all have electron configurations of s2p3, giving them five valence electrons. These elements include Nitrogen (N), Phosphorus (P), Arsenic (As), Antimony (Sb), and Bismuth (Bi).
Can F have an expanded octet?
Deviations from the Octet Rule As a result, the second period elements (more specifically, the nonmetals C, N, O, F) obey the octet rule without exceptions. Examples of molecules in which a third period central atom contains an expanded octet are the phosphorus pentahalides and sulfur hexafluoride.
What is the octet state?
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.
Can xenon have an expanded octet?
This is possible since xenon is a large atom with valence electrons far away from its nucleus (relative to the noble gases that precede it) and fluorine is electronegative enough to pull away Xenons valence electrons allowing for an expanded octet to form.
Does NF3 follow the octet rule?
Species with Expanded Octets An atom like phosphorus or sulfur which has more than an octet is said to have expanded its valence shell. This can only occur when the valence shell has enough orbitals to accommodate the extra electrons. Thus nitrogen can form NF3 (in which nitrogen has an octet) but not NF5.
Are there any exceptions to the octet rule?
Some of the exceptions about octet rule are given below: An electron or molecule which contains unpaired electrons in its outermost shell or valence shell is considered as free radical. These electrons are less stable and do not obey the octet rule. Elements like hydrogen, lithium, helium do not obey the octet rule.
What makes an element satisfy the octet rule?
The formation of such bonds can satisfy the octet rule. The elements in the second group of the periodic table fulfill the criteria for 8 electrons by losing, gaining or sharing electrons between atoms. The type of bond that is formed depends on the number of electrons in the valence shell, as well as the total energy required to form the bond.
Which is an example of the duet rule instead of the octet rule?
Since the first shell can only accommodate two electrons, elements such as lithium, helium, and hydrogen obey the duet rule instead of the octet rule. For example, lithium can lose an electron to have a stable configuration in which the valence shell holds two electrons.
Why does lithium not obey the octet rule?
For example, lithium can lose an electron to have a stable configuration in which the valence shell holds two electrons. Due to the presence of a d-orbital, the transition elements do not obey the octet rule.