Electron Configurations
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| The arrangement of electrons in an atom is known as | the atom’s electron configuration
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| The lowest energy arrangement of the electrons for each element is called | the element’s ground-state electron configuration
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| What principle states that an electron occupies the lowest-energy orbital that can receive it | Aufbau principle
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| no two electrons in the same atom can have the same set of four quantum numbers is what principle | Pauli exclusion principle
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| The Pauli Exclusion principal,angular momentum, and magnetic quantum numbers specify what | the energy, shape, and orientation of an orbital
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| Whose rule says orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second electron, and all electrons in singly occupied orbitals must have the same spin state. | Hund’s rule
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| In orbital notation, an unoccupied orbital is represented by | a line, ,
with the orbital’s name written underneath the line
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| An orbital containing one electron is represented as | ↑
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| An orbital containing two electrons is represented as | ↑↓
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| The lines are labeled with the principal quantum number and | sublevel letter.
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| How is the Electron-configuration notation different form orbital notation | eliminates the lines and arrows of orbital notation. Instead, the number of electrons in a sublevel is shown by adding a superscript to the sublevel designation
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| What does the superscript indicate | The superscript indicates that one electron
is present
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| The highest-occupied energy level is | the electron-containing
main energy level with the highest principal quantum number
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| electrons that are not in the highest-occupied energy level. | inner-shell electrons
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| The Group 18 elements are called the | noble gases.
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| Name the Group 18 elements | helium, neon, argon, krypton, xenon, and radon
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| an outer main energy level occupied, in most cases, by eight electrons | noble-gas configuration
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| The arrangement of electrons in an atom is | Electron configuration
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| The lowest-energy arrangement of the electrons for each element | Ground-state electron configuration
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| The electron containing main energy level with the highest principle quantum number | Highest occupied energy level
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