객관식
Which of the following is NOT considered a form of matter?
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목차
- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
- Physical & Chemical Changes19m
- Chemical Properties7m
- Physical Properties6m
- Intensive vs. Extensive Properties13m
- Temperature12m
- Scientific Notation13m
- SI Units7m
- Metric Prefixes24m
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- Conversion Factors16m
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- Density12m
- Density of Geometric Objects19m
- Density of Non-Geometric Objects5m
- 2. Atoms & Elements4h 24m
- The Atom10m
- Subatomic Particles15m
- Isotopes17m
- Ions27m
- Atomic Mass33m
- Periodic Table: Classifications11m
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- Millikan Oil Drop Experiment7m
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- Combustion Analysis40m
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- Polyatomic Ions25m
- Naming Ionic Compounds12m
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- 10. Periodic Properties of the Elements3h 10m
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- The Colligative Properties15m
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- 17. Acid and Base Equilibrium5h 5m
- Acids Introduction9m
- Bases Introduction7m
- Binary Acids15m
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- Bases14m
- Amphoteric Species5m
- Arrhenius Acids and Bases5m
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- 18. Aqueous Equilibrium4h 47m
- Intro to Buffers21m
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- 19. Chemical Thermodynamics1h 51m
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- 21. Nuclear Chemistry2h 37m
- Intro to Radioactivity10m
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- Mass Defect19m
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- 22. Organic Chemistry5h 7m
- Introduction to Organic Chemistry8m
- Structural Formula8m
- Condensed Formula10m
- Skeletal Formula6m
- Spatial Orientation of Bonds3m
- Intro to Hydrocarbons16m
- Isomers11m
- Chirality15m
- Functional Groups in Chemistry11m
- Naming Alkanes4m
- The Alkyl Groups9m
- Naming Alkanes with Substituents13m
- Naming Cyclic Alkanes6m
- Naming Other Substituents8m
- Naming Alcohols11m
- Naming Alkenes11m
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- Naming Ketones5m
- Naming Aldehydes5m
- Naming Carboxylic Acids4m
- Naming Esters8m
- Naming Ethers5m
- Naming Amines5m
- Naming Benzene7m
- Alkane Reactions7m
- Intro to Addition Reactions4m
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- Hydrogenation Reactions3m
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- Alcohol Reactions: Substitution Reactions4m
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- Ester Reactions: Esterification4m
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- Carboxylic Acid Reactions4m
- Amine Reactions3m
- Amide Formation4m
- Benzene Reactions10m
- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
- Main Group Elements: Boiling & Melting Points7m
- Main Group Elements: Density11m
- Main Group Elements: Periodic Trends7m
- The Electron Configuration Review16m
- Periodic Table Charges Review20m
- Hydrogen Isotopes4m
- Hydrogen Compounds11m
- Production of Hydrogen8m
- Group 1A and 2A Reactions7m
- Boron Family Reactions7m
- Boron Family: Borane7m
- Borane Reactions7m
- Nitrogen Family Reactions12m
- Oxides, Peroxides, and Superoxides12m
- Oxide Reactions4m
- Peroxide and Superoxide Reactions6m
- 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. Intro to General Chemistry
Classification of Matter
객관식
Which of the following substances is a compound?
A
Air
B
Fe
C
NaCl
D
O2
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검증된 단계별 안내1
Understand the definition of a compound: A compound is a substance formed when two or more different elements chemically bond together in fixed proportions.
Analyze each option: Air is a mixture of gases, not chemically bonded; Fe (iron) is a pure element; O\_2 (oxygen gas) is a molecule made of only one element.
Identify NaCl: Sodium chloride (NaCl) consists of sodium (Na) and chlorine (Cl) atoms chemically bonded in a fixed ratio, making it a compound.
Conclude that among the options, only NaCl fits the definition of a compound because it contains two different elements chemically combined.
Remember that mixtures (like air) and elemental substances (like Fe and O\_2) are not compounds.
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