GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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states that single electrons electrons with the same spin must occupy each-energy orbital before additional electrons with opposite spins can occupy the same orbitals
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states that a maximum of two electrons can occupy a single atomic orbital, but if only if the electrons have opposite spins
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states that each electron occupies the lowest energy orbital available
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None of the above
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Detailed explanation-1: -Hund’s rule states that orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second electron, and that each of the single electrons must have the same spin. The figure below shows how a set of three p orbitals is filled with one, two, three, and four electrons.
Detailed explanation-2: -Hund’s Rule. Hund’s rule: every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin.
Detailed explanation-3: -Example of hund’s rule (example of hund’s rule of maximum multiplicity) For example, a nitrogen atom’s electronic configuration would be 1s 2 2s 2 2p 3 . The same orbital will be occupied by the two 2s electrons although different orbitals will be occupied by the three 2p electrons in accordance to Hund’s rule.
Detailed explanation-4: -Hund’s rule states that single electrons with the same spin must occupy each equal-energy orbital before additional electrons with opposite spins can occupy the same orbital.
Detailed explanation-5: -This rule is fairly reliable (with occasional failures) for the determination of the state of a given excited electron configuration. It was discovered in the year 1925 by Friedrich Hund. According to Hund’s rule: Each orbital in a sublevel is separately occupied before any orbital is doubly occupied.