Chlorine has seven valence electrons, so if it takes one it will have eight (an octet). Chlorine has the electron configuration of argon when it gains an electron.

Does chlorine violate octet rule?

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.

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. Boron has three valence electrons.

Is chlorine in octet state?

The result is that chlorine will very often form a compound in which it has eight electrons in its outer shell (a complete octet), as in Cl’.

According to octet rule, the sodium atom which has only single electron in outermost shell , looses the electron to get a stable configuration like Ne gas, while the chlorine gas with 7 valence electrons gains an electron from the Na atom to obtain an stable configuration like Ar gas.

Why does pf5 violate the octet rule?

Phosphorus pentafluorides: Here in phosphorous pentafluoride, the outer electron of phosphorous is more than eight. Hence it is an example of an expanded octet where the valence electron of the central atom is more than eight. Hence, both boron trifluoride and phosphorous pentafluoride violate the octet rule.

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.

Does NH3 follow the octet rule?

Nitrogen, the next nonmetal, has 5 electrons in the valence shell, so it needs to combine with 3 hydrogen atoms to fulfill the octet rule and form a stable compound called ammonia (NH3).

Does bromine follow the octet rule?

This usually occurs in compounds containing Be or B. Elements in the third period and below can accommodate more than an octet of electrons. Although elements such as Si, P, S, Cl, Br, and I obey the octet rule in many cases, under other circumstances they form more bonds than the rule allows.

Which elements must follow octet rule?

Elements that obey octet rules are the main group elements which are oxygen, carbon, nitrogen. s-block and p-block elements obey the octet rule except for hydrogen, helium, and lithium.

Does SF6 obey the octet rule?

Sulfur hexafluoride (SF6) is another molecule that doesn’t obey the octet rule. It has sulfur S bonded to six fluorine atoms F. With two electrons per bond, that makes 12 electrons for sulfur. That’s a bit more than an octet of 8.

What is octet rule with example?

Octet Rule Example: Sodium Chloride The second is a nonmetal which has high electronegativity. A good example of this can be chlorine. A chlorine atom in its outer electron shell has seven electrons. Here, the first and second shells have two and eight electrons respectively.

Which one of the following violates the octet rule?

There are three violations to the octet rule: odd-electron molecules, electron-deficient molecules, and expanded valence shell molecules.

How do nonmetals achieve an octet?

Atoms of nonmetals tend to gain electrons in order to fill their outermost principal energy level with an octet. Atoms form compounds in ways that give them eight valence electrons. Metals tend to lose electrons to achieve this configuration. Nonmetals tend to gain electrons to achieve this configuration.

Is PF5 an incomplete octet?

PF5, SF6 and H2SO4 are the examples of expanded octet molecules.

Is PCL5 obey the octet rule?

No. The P in PCl has 10 valence electrons. The Octet “Rule” is really more of a rule of thumb ” and one particularly for organic chemistry at that ” than a “rule” rule. It’s not a fundamental law of nature or anything.

Is PF5 electron deficient?

Correct reason : BF3 is electron deficient but PF5 is electron rich molecule.

Why can chlorine have an expanded octet?

The octet rule can be ‘expanded’ by some elements by utilizing the d-orbitals found in the third principal energy level and beyond. Sulfur, phosphorus, silicon, and chlorine are common examples of elements that form an expanded octet.

Does no2 follow the octet rule?

Nitrogen dioxide is the chemical compound with the formula NO2. Again, nitrogen dioxide does not follow the octet rule for one of its atoms, namely nitrogen. The total number of valence electrons is 5+2(6)=17. There is persistent radical character on nitrogen because it has an unpaired electron.

Does beryllium follow the octet rule?

Since beryllium only has two valence electrons, it does not typically attain an octet through sharing of electrons. The Lewis structure of gaseous beryllium hydride (BeH 2 ) consists of two single covalent bonds between Be and H (see Figure below ).

Does PH3 obey octet rule?

(b) PH3: Phosphorus (Group 5A) has five valence electrons, and will complete its octet by making three bonds. There are three hydrogens, so it makes a single bond with each.

Does h2so4 follow the octet rule?

No, 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.

Does NH4+ follow the octet rule?

With the help of four single bonds, it already shares eight electrons. As a result, the nitrogen follows the octet rule and has 8 electrons surrounding it on the four terminals of the NH4+ molecule’s tetrahedral geometry.

Does chlorine gain or lose electrons?

Chlorine gains an electron, leaving it with 17 protons and 18 electrons. Since it has 1 more electron than protons, chlorine has a charge of ‘1, making it a negative ion. When ions form, atoms gain or lose electrons until their outer energy level is full.

Does pcl3 follow the octet rule?

In PCl3, the octet for both phosphorus and Chlorine atoms is complete. Therefore, it follows the octet rule.

Does lithium obey 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.

Does SO2 obey octet rule?

Lewis Dot of Sulfur Dioxide SO2. S does not follow the octet rule. It can hold more than 8 electrons.

Why do atoms follow octet rule?

Atoms follow the octet rule because they always seek the most stable electron configuration. Following the octet rule results in completely filled s- and p- orbitals in an atom’s outermost energy level. Low atomic weight elements (the first 20 elements) are most likely to adhere to the octet rule.

How do you know if something violates the octet rule?

The octet rule is violated whenever a bonded atom has either fewer or more than eight valence electrons in its valence shell.

What type of element is chlorine?

chlorine (Cl), chemical element, the second lightest member of the halogen elements, or Group 17 (Group VIIa) of the periodic table. Chlorine is a toxic, corrosive, greenish yellow gas that is irritating to the eyes and to the respiratory system.

How does calcium obey the octet rule?

In order to have a complete octet, calcium must lose these two outermost electrons, also called valence electrons. Calcium will react with nonmetals to form ionic compounds. For example, calcium will react with oxygen to form calcium oxide, CaO .

Does lithium follow the duet rule?

The rule of duet refers to the first five elements of the periodic table. They are most stable when the 1s orbital is filled with two (duet) electrons. Hydrogen looks to gain one electron, Lithium, Beryllium and Boron look to lose 1,2, or 3 electrons respectively in order to have a filled outer shell like Helium.

Is PF5 an expanded octet?

PF5, SF6 and H2SO4 are the examples of expanded octet molecules.

Why is PCL5 an exception to the octet rule while PCL3 is not?

Why is nitrogen an example of a coordinate covalent bond? Why is PCL5 an exception to the octet rule whereas PCL3 is not? PCL3 every reactant atom follows the octet rule. In PCL5 it is an expanded octet containing ten electrons.

Which of the following does not follow octet rule PCL5?

PCl5 does not follows octeet, rule, it has 10 electrons in its valence shell.

What is expanded octet rule?

Expanded octet (hypervalent): A valence shell electron count that exceeds eight electrons. In methane (CH4), carbon has a full octet (eight valence electrons). In phosphate ion (PO43-), each oxygen has a full octet (eight valence electrons), whereas phosphorus has an expanded octet (ten valence electrons).

Does SO3 follow octet rule?

Answer. Answer: Why SO3 does not follow octet rule? S could simply form a double bond with any one of the oxygen atom. … Since in reality all 3 bonds are equal and symmetric, the bonds are hybrids of dative single bond and (sharing) double bond.

Does CF4 follow the octet rule?

So, each fluorine has 8 electrons around them and that is enough for completing their octet. So, both atoms (Carbon and fluorine) of the CF4 molecule complete their octet comfortably.