Which rule or principle states that orbitals of equal energy fill with one unpaired electron each before electrons begin to pair up? Heisenberg's Uncertainly Principle Hund's Rule Aufbau Principle Pauli Exclusion Principle

Which rule or principle states that orbitals of equal energy fill with one unpaired electron each before electrons begin to pair up? Heisenberg's Uncertainly Principle Hund's Rule Aufbau Principle Pauli Exclusion Principle

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter7: The Structure Of Atoms And Periodic Trends

Section: Chapter Questions

Problem 19PS

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Question

Which rule or principle states that orbitals of equal energy fill with one unpaired
electron each before electrons begin to pair up?
Heisenberg's Uncertainly Principle
Hund's Rule
Aufbau Principle
Pauli Exclusion Principle

Which of the following pairs of symbols represents isotopes of the same unidentified
element, "X"?
O¹2X and ¹2X
¹2X and ¹3X
O¹X and ¹2X
O12X and 13X

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