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- https://chem.libretexts.org/Courses/Saint_Francis_University/CHEM_113%3A_Human_Chemistry_I_(Zovinka)/02%3A_Atoms_and_the_Periodic_Table/2.07%3A_Electron_ConfigurationsThere are a set of general rules that are used to figure out the electron configuration of an atomic species: Aufbau Principle, Hund's Rule and the Pauli-Exclusion Principle.
- https://chem.libretexts.org/Under_Construction/Purgatory/CHEM_2100%3A_General_Chemistry_I_(Mink)/06%3A_Electronic_Structure_and_Periodic_Properties/6.04%3A_Electronic_Structure_of_Atoms_(Electron_Configurations)The relative energy of the subshells determine the order in which atomic orbitals are filled. Electron configurations and orbital diagrams can be determined by applying the Pauli exclusion principle (...The relative energy of the subshells determine the order in which atomic orbitals are filled. Electron configurations and orbital diagrams can be determined by applying the Pauli exclusion principle (no two electrons can have the same set of four quantum numbers) and Hund’s rule (whenever possible, electrons retain unpaired spins in degenerate orbitals). Electrons in the outermost orbitals, called valence electrons, are responsible for most of the chemical behavior of elements.
- https://chem.libretexts.org/Courses/Widener_University/Chem_145%3A_General_Chemistry_I_(van_Bramer)/07%3A_Electronic_Structure_and_Periodic_Properties/7.04%3A_Electronic_Structure_of_Atoms_(Electron_Configurations)The relative energy of the subshells determine the order in which atomic orbitals are filled. Electron configurations and orbital diagrams can be determined by applying the Pauli exclusion principle (...The relative energy of the subshells determine the order in which atomic orbitals are filled. Electron configurations and orbital diagrams can be determined by applying the Pauli exclusion principle (no two electrons can have the same set of four quantum numbers) and Hund’s rule (whenever possible, electrons retain unpaired spins in degenerate orbitals). Electrons in the outermost orbitals, called valence electrons, are responsible for most of the chemical behavior of elements.
- https://chem.libretexts.org/Courses/Brevard_College/CHE_310%3A_Inorganic_Chemistry_(Biava)/03%3A_Electronic_Structure_and_Periodic_Properties/3.05%3A_Electronic_Structure_of_Atoms_(Electron_Configurations)The relative energy of the subshells determine the order in which atomic orbitals are filled. Electron configurations and orbital diagrams can be determined by applying the Pauli exclusion principle (...The relative energy of the subshells determine the order in which atomic orbitals are filled. Electron configurations and orbital diagrams can be determined by applying the Pauli exclusion principle (no two electrons can have the same set of four quantum numbers) and Hund’s rule (whenever possible, electrons retain unpaired spins in degenerate orbitals). Electrons in the outermost orbitals, called valence electrons, are responsible for most of the chemical behavior of elements.
- https://chem.libretexts.org/Bookshelves/General_Chemistry/ChemPRIME_(Moore_et_al.)/05%3A_The_Electronic_Structure_of_Atoms/5.16%3A_Electron_ConfigurationsIn order to examine the results of the wave theory of the electron for each element in the periodic table, we must recall the general rules that are necessary in order to predict electron configuratio...In order to examine the results of the wave theory of the electron for each element in the periodic table, we must recall the general rules that are necessary in order to predict electron configurations for all atoms of the elements.
- https://chem.libretexts.org/Courses/Northern_Michigan_University/CH_215%3A_Chemistry_of_the_Elements_Fall_2023/01%3A_Atoms_and_Electronic_Structure/1.09%3A_Electron_Configurations_for_Transition_Metal_ElementsWriting an electron configuration for a transition metal element follows the same basic steps as for writing an electron configuration for an element in the s-block or p-block. List each subshell, and...Writing an electron configuration for a transition metal element follows the same basic steps as for writing an electron configuration for an element in the s-block or p-block. List each subshell, and then fill each subshell with an appropriate number of electrons until all electrons in the element are accounted for. Transition elements have electrons in the d orbital, which introduces some additional nuance in the electron configurations.
- https://chem.libretexts.org/Courses/Oregon_Institute_of_Technology/OIT%3A_CHE_202_-_General_Chemistry_II/Unit_3%3A_Periodic_Patterns/3.1%3A_Electron_ConfigurationsFor example, iron (1s 2 2s 2 2p 6 3s 2 3p 6 3d 6 4s 2 ) forms the ion Fe 2+ (1s 2 2s 2 2p 6 3s 2 3p 6 3d 6 ) by the loss of the 4s electrons and the ion Fe 3+ (1s 2 2s 2 2p 6 3s 2 3p 6 3d 5 ) by the l...For example, iron (1s 2 2s 2 2p 6 3s 2 3p 6 3d 6 4s 2 ) forms the ion Fe 2+ (1s 2 2s 2 2p 6 3s 2 3p 6 3d 6 ) by the loss of the 4s electrons and the ion Fe 3+ (1s 2 2s 2 2p 6 3s 2 3p 6 3d 5 ) by the loss of the 4s electrons and one of the 3d electrons.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/09%3A_Chemical_Bonding_in_Diatomic_Molecules/9.15%3A_Molecular_Term_Symbols_Designate_SymmetryThis page discusses the quantum numbers for diatomic molecules, highlighting their similarities and differences with atomic quantum numbers, particularly the angular momentum quantum number Λ. It ...This page discusses the quantum numbers for diatomic molecules, highlighting their similarities and differences with atomic quantum numbers, particularly the angular momentum quantum number Λ. It covers the impact of parity and reflection symmetries on molecular orbitals, including symmetric (g) and anti-symmetric (u) designations. The rules for determining overall orbital reflection apply mainly to Σ states.
- https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/06%3A_The_Periodic_Table/6.14%3A_Lanthanides_and_ActinidesThis page discusses Russian nesting dolls as a metaphor for the layered structure of lanthanides and actinides in the periodic table. Lanthanides (atomic numbers 58-71) are used in alloys and optical ...This page discusses Russian nesting dolls as a metaphor for the layered structure of lanthanides and actinides in the periodic table. Lanthanides (atomic numbers 58-71) are used in alloys and optical devices, while actinides (atomic numbers 90-103) are radioactive and serve energy applications such as nuclear power. Both groups, known as inner transition elements, exhibit unique properties and have various industrial applications.
- https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/06%3A_The_Periodic_Table/6.11%3A_Noble_GasesThis page discusses noble gases, such as helium, xenon, and radon, which are used in neon lights for colorful displays. These gases are chemically inert and exist as monatomic gases at room temperatur...This page discusses noble gases, such as helium, xenon, and radon, which are used in neon lights for colorful displays. These gases are chemically inert and exist as monatomic gases at room temperature. Although traditionally thought to be unreactive, noble gases can form compounds, with xenon being the first in 1962. When an electric current passes through them, they emit unique colors, enhancing their use in illumination, though radon is excluded due to its radioactivity.
- https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/06%3A_The_Periodic_Table/6.12%3A_HalogensThis page discusses halogens, including their high reactivity, electron configuration with seven valence electrons, and physical states at room temperature—fluorine and chlorine are gases, bromine is ...This page discusses halogens, including their high reactivity, electron configuration with seven valence electrons, and physical states at room temperature—fluorine and chlorine are gases, bromine is a liquid, and iodine is a solid. It highlights their tendency to exist in nature combined with other substances, such as salts found in the ocean.
