Multiple Choice
When sulfur forms an ion, does it become a cation or an anion?
Table of contents
- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
- Physical & Chemical Changes19m
- Chemical Properties7m
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- 16. Chemical Equilibrium2h 30m
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- 22. Organic Chemistry5h 7m
- Introduction to Organic Chemistry8m
- Structural Formula8m
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- Skeletal Formula6m
- Spatial Orientation of Bonds3m
- Intro to Hydrocarbons16m
- Isomers11m
- Chirality15m
- Functional Groups in Chemistry11m
- Naming Alkanes4m
- The Alkyl Groups9m
- Naming Alkanes with Substituents13m
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- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
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- Nitrogen Family Reactions12m
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- Noble Gas Compounds3m
- 24. Transition Metals and Coordination Compounds3h 19m
- Atomic Radius & Density of Transition Metals11m
- Electron Configurations of Transition Metals7m
- Electron Configurations of Transition Metals: Exceptions11m
- Paramagnetism and Diamagnetism10m
- Ligands10m
- Complex Ions5m
- Coordination Complexes7m
- Classification of Ligands11m
- Coordination Numbers & Geometry9m
- Naming Coordination Compounds22m
- Writing Formulas of Coordination Compounds8m
- Isomerism in Coordination Complexes17m
- Orientations of D Orbitals4m
- Intro to Crystal Field Theory10m
- Crystal Field Theory: Octahedral Complexes5m
- Crystal Field Theory: Tetrahedral Complexes4m
- Crystal Field Theory: Square Planar Complexes4m
- Crystal Field Theory Summary8m
- Magnetic Properties of Complex Ions9m
- Strong-Field vs Weak-Field Ligands6m
- Magnetic Properties of Complex Ions: Octahedral Complexes11m
- 1. The Chemical World10m
2. Atoms & Elements
Ions
Multiple Choice
Which noble gas has the same electron configuration as the ion Cl^-?
A
Xe
B
Kr
C
Ar
D
Ne
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Verified step by step guidance1
Identify the electron configuration of the neutral chlorine (Cl) atom. Chlorine has an atomic number of 17, so it has 17 electrons.
Determine the electron configuration of the chloride ion (Cl⁻). Since it has gained one electron, it now has 18 electrons.
Recall that the electron configuration of an ion with 18 electrons is the same as the noble gas with atomic number 18, which is argon (Ar).
Write the electron configuration for Ar to confirm it matches Cl⁻: \$1s^2 2s^2 2p^6 3s^2 3p^6$.
Compare the electron configurations of the given noble gases (Xe, Kr, Ne) to see which matches Cl⁻. Argon (Ar) matches exactly.
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