Table of Contents
Which molecules has an expanded octet?
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.
Does XeF2 have an expanded octet?
Lewis Dot of Xenon Difluoride XeF2. Xe does not follow the octet rule. It actually bonds. Xenon having valence electrons in the 4th energy level, will also have access to the 4d sublevel, thus allowing for more than 8 electrons.
How do you know if a molecule has an expanded octet?
Count the total number of electrons for the valence shell of each atom. If the number turns out to be more than 8, the atom is having an expanded octet in the molecule concerned.
Does clf3 have an expanded octet?
The ‘octet’ rule is based upon available ns and np orbitals for valence electrons (2 electrons in the s orbitals, and 6 in the p orbitals). Beginning with the n3 principle quantum number, the d orbitals become available (l2).
How do you know what has an expanded octet?
Atoms with an expanded octet Phosphorous often has 5 orbitals (10 electrons) and sulfur often has 6 orbitals (12 electrons) because they are in the third period, but nitrogen and oxygen can never have expanded octets because they are in the second period and there is not such thing as a 2d orbital.
Which molecule Cannot have an expanded octet?
(1 bond xd7 2 e) + (3 lone pairs xd7 2 e) 8 electrons. (2 bonds xd7 2 e) + (3 lone pairs xd7 2 e) 10 electrons. This is more than 8 which means chlorine has an expanded octet.
Which of the following molecules contains an atom with an expanded octet?
Expanded octet (hypervalent): A valence shell electron count that exceeds eight electrons. In phosphate ion (PO43-), each oxygen has a full octet (eight valence electrons), whereas phosphorus has an expanded octet (ten valence electrons).
Does XeF4 have an expanded octet?
Re: expanded octet XeF4 F is on the second row, therefore cannot have an expanded octet.
Which compounds have an expanded octet?
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.
Does BeCl2 have an expanded octet?
Re: Beryllium Octet Rule To add to this, you can tell that beryllium will now have a full octet because of formal charge. In BeCl2, Be has 2 shared bonds, making its formal charge 0, and Cl has 6 unshared electrons and 1 shared bond, making the formal charge of both Cl atoms in BeCl2 0.
Which elements Cannot have an expanded octet?
These elements include hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon. Elements that cannot have an expanded octet are: hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon.
How do you tell if a molecule has an expanded octet?
Expanded octet (hypervalent): A valence shell electron count that exceeds eight electrons. In phosphate ion (PO43-), each oxygen has a full octet (eight valence electrons), whereas phosphorus has an expanded octet (ten valence electrons).
Does ClO3 have an expanded octet?
Lewis Dot of the Chlorate Ion ClO3- Chlorine does not follow the octet rule. It will hold more than 8 electrons. Chlorine having valence electrons in the 3rd energy level, will also have access to the 3d sublevel, thus allowing for more than 8 electrons.
How do you find the expanded octet?
These elements include hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon. Elements that cannot have an expanded octet are: hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon.
Which periods can have an expanded octet?
An element from Period 3 and below will be able to expand octet by making use of its energetically accessible, or low lying d-subshell for bonding.
When can elements have an expanded octet?
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. For example, in the case of phosphorus, the valence shell has a principal quantum number n 3.
How do you tell if an element has an octet?
These elements include hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon. Elements that cannot have an expanded octet are: hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon.
What elements Cannot have an expanded octet?
These elements include hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon. Elements that cannot have an expanded octet are: hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon.
Which molecule does not obey octet rule?
Nitric oxide: Nitric oxide (NO) is an example of a stable free radical. It does not obey the octet rule on the nitrogen atom. Each line around the atoms represents a pair of electrons.
What are the 3 exceptions to the octet rule?
However, there are three general exceptions to the octet rule: Molecules, such as NO, with an odd number of electrons; Molecules in which one or more atoms possess more than eight electrons, such as SF6; and. Molecules such as BCl3, in which one or more atoms possess less than eight electrons.
Is xef2 an expanded octet?
Lewis Dot of Xenon Difluoride XeF2. Xe does not follow the octet rule. It actually bonds. It will hold more than 8 electrons.
Is XeF2 an expanded octet?
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.
Is clf3 an expanded octet?
Lewis Dot of Xenon Difluoride XeF2. Xe does not follow the octet rule. It actually bonds. It will hold more than 8 electrons.
Is XeF4 an exception to the octet rule?
Lewis Dot of Xenon Tetrafluoride XeF4. Xe does not follow the octet rule. It actually bonds. Xenon having valence electrons in the 4th energy level, will also have access to the 4d sublevel, thus allowing for more than 8 electrons.
Which has expanded octet?
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.
