Why Hund's rule is called rule of maximum multiplicity ? Medium Solution Verified by Toppr This is because out of the various possible electronic configurations, only that configuration is correct for which the total spin value is maximum.
What is Hunds rule of maximum multiplicity?
Hunds Rule of Maximum Multiplicity rule states that for a given electron configuration, the term with maximum multiplicity falls lowest in energy. According to this rule electron pairing in p, d and f orbitals cannot occur until each orbital of a given subshell contains one electron each or is singly occupied. What was Hund’s rule also called?
What is Hund’s rule in chemistry?
The first rule is especially important in chemistry, where it is often referred to simply as Hund’s Rule. The three rules are: For a given electron configuration, the term with maximum multiplicity has the lowest energy. The multiplicity is equal to , where is the total spin angular momentum for all electrons.
Why is the law of maximum multiplicity called the law?
And if there there is two unpaired electrons it is in Triplet state 2*1+1=3 like that So higher the multiplicity lower the energy of a state means higher the stability. So that why lower energy states filled first i.e, state with maximum multiplicity filled first. that’s why we call it as law of maximum multiplicity . I hope this will help you.
What is meant by maximum multiplicity of spin?
First of all maximum multiplicity means high spin state. High spin state defined as 2s+1 where “s” is spin of total no of unpaired electrons for e.g if there is no unpaired electrons it is in Singlet state because 2*0+1=1
What is Hund's rule of maximum multiplicity explain with example?
Since the spin of each electron is 1/2, the total spin is one-half the number of unpaired electrons, and the multiplicity is the number of unpaired electrons + 1. For example, the nitrogen atom ground state has three unpaired electrons of parallel spin, so that the total spin is 3/2 and the multiplicity is 4.
What does Hund's rule refers to?
Hund's rule states that: Every orbital in a sublevel is singly occupied before any orbital is doubly occupied. All of the electrons in singly occupied orbitals have the same spin (to maximize total spin).
Who proposed the law of maximum multiplicity?
Hund's Rule of Maximum Multiplicity rule states that for a given electron configuration, the term with maximum multiplicity falls lowest in energy. According to this rule electron pairing in p, d and f orbitals cannot occur until each orbital of a given subshell contains one electron each or is singly occupied.
What is the other name of Hund's rule?
Hunds Rule of Maximum Multiplicity rule states that for a given electron configuration, the term with maximum multiplicity falls lowest in energy.
Who invented Hund's rule?
Friedrich Hund Biography & Contributions Friedrich Hund [Friedrich Hermann Hund] was a German physicist born on February 04, 1896 – died on March 31, 1997. Hund was made pivotal contributions to quantum theory. Hund discovered the so-called tunnel effect or quantum tunneling and Hund's rule of maximum multiplicity.
Why is Hund's rule important?
Hund's Rule can help predict the properties of atoms, as paired and unmated electrons have distinct properties (specifically with interactions with magnetic fields). When atoms come into contact with each other, the outer electrons of those atoms, or valence shell, initially interact.
Why Hund's rule is not applicable for chlorine?
Explanation: The number of singly occupied orbitals or unpaired electrons will decrease if Hund's rule is not applied. Total unpaired electrons if Hund's rule is followed is 5. Hence only one electron will be unpaired if this rule is not followed or is not applicable in a NO molecule.
What is the difference between Hund's rule and Pauli exclusion principle?
Pauli Exclusion Principle is about quantum numbers of an atom. Hund rule is about how electrons are filled to the orbitals of an atom. Pauli Exclusion Principle says of having only two electrons per orbital. And Hund rule says that only after filling one electron to each orbital, electron pairing will happen.
What is Hund's rule and Pauli exclusion principle?
satisfies Hund's rule. Pauli Exclusion Principle. No two electrons in a atom can have an identical set of four quantum numbers. This means an orbital can hold a maximum of two electrons, and then the electrons must have opposite spins, +1/2 and -1/2.
What is Hund's rule violation example?
Here, in p orbital one subshell is vacant but one subshell is doubly filled or full filled. This type of electronic configuration violated the Hund's rule. Here, Hund's rule is followed as all subshells are singly filled before getting doubly filled.
Which of the following should be correct according to Hund's rule?
There are three p, five d and seven f orbitals. Thus, pairing of electrons will start in the p, d and f orbitals with the entry of 4th, 6th and 8th electron, respectively.