Which Elements Can Have More Than 8 Electrons Around Them?

Why outermost shell Cannot have more than 8 electrons?

The shells of an atom cannot accommodate more than 8 electrons, even if it has a capacity to accommodate more electrons.

This is a very important rule called the Octet rule.

According to this rule, atoms gain, loose or share electrons to achieve the stable configuration similar to the nearest noble gas..

Why is 8 The maximum number of valence electrons?

This is because of the quantum nature of the atoms, where electrons are organized in shells: the first (named the K shell) has 2 electrons, the second (L-shell) has 8, the third (M shell) has 18. Atoms combine into molecules by trying in most cases to have valence electrons entirely filling a shell.

Which elements can hold more than 8 valence electrons?

Sulfur, phosphorus, silicon, and chlorine are common examples of elements that form an expanded octet. Phosphorus pentachloride (PCl5) and sulfur hexafluoride (SF6) are examples of molecules that deviate from the octet rule by having more than 8 electrons around the central atom.

Why can Sulfur Form 6?

Sulphur has 6 Valance electrons so according to VBT it can form maximum of 6 covalent bonds. … This is because of availablity of vacant d orbitals in Sulphur, which can accommodate extra electrons other than octet. Thus sulphur forms SF6.

Why does boron only need 6 electrons?

Boron has a charge of 5. This is balanced by 5 electrons. … The valence electrons may participate in bonding through sharing with other atoms, to make three bonds. Three bonds = six electrons.

Why is 3rd shell 8 or 18?

The third shell of an atom has 18 electrons only not 8 electrons. You might be confused because first the electrons of 4s are filled and then the 10 electrons of 3d shells are filled. They are filled because of the n-l rule. … So after filling the 3s and 3p subshell with 8 electrons, the next shell to fill is the 4s one.

How many lone pairs does sulfur have?

three lone pairsContinuing with sulfur, we observe that in (a) the sulfur atom shares one bonding pair and has three lone pairs and has a total of six valence electrons.

Can fluorine have more than 8 electrons?

If we arrange the atoms and electrons symmetrically, we obtain a structure with six bonds to sulfur; that is, it is six-coordinate. Each fluorine atom has an octet, but the sulfur atom has 12 electrons surrounding it rather than 8.

Which elements can have less than 8 electrons?

The two elements that most commonly fail to complete an octet are boron and aluminum; they both readily form compounds in which they have six valence electrons, rather than the usual eight predicted by the octet rule.

Why does Beryllium only need 4 electrons?

In some compounds, the number of electrons surrounding the central atom in a stable molecule is fewer than eight. Beryllium is an alkaline earth metal and so may be expected to form ionic bonds. … Since beryllium only has two valence electrons, it does not typically attain an octet through sharing of electrons.

Which of the following atoms can have more than 8 outermost electrons?

Answer: Only atoms with empty d orbital can achieve more than 8 electrons in a covalent bond. The electronic configuration of sulphur in ground state is [Ne]3s2 3p4. In this state it has two unpaired electron so it can make only two bonds.

What does it mean if an element has 8 valence electrons?

Atoms of group 18 elements have eight valence electrons (or two in the case of helium). These elements already have a full outer energy level, so they are very stable. As a result, they rarely if ever react with other elements. … Therefore, it is very reactive and gives up electrons in chemical reactions.

Can you have more than 8 valence electrons?

Unlike atoms from periods one and two that only have the s and p orbitals (total of 8 valence electrons), atoms like phosphorus, sulfur, and chlorine can have more than 8 electrons because they are not restricted to the s and p orbitals and have a d orbital for additional electrons needed for bonding.

Why can sulfur have more than 8 electrons?

Its structure is Here the sulfur atom has six electron pairs in its valence shell. 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. … An octet would be 3s23p6.

Can sulfur have 10 electrons?

Now sulfur has 6 unpaired electrons which means it can form 6 covalent bonds to give a total of 12 electrons around its valence shell. So in addition to being octet, sulfur can expand octet to have 10 or 12 electrons.