객관식
Which of the following best describes the ground state of an atom?
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- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
- Physical & Chemical Changes19m
- Chemical Properties7m
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- 2. Atoms & Elements4h 25m
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- 10. Periodic Properties of the Elements3h 10m
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- 18. Aqueous Equilibrium4h 47m
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- 21. Nuclear Chemistry2h 37m
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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
- Naming Cyclic Alkanes6m
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- Naming Alkenes11m
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- Naming Ketones5m
- Naming Aldehydes5m
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- Naming Ethers5m
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- Naming Benzene7m
- Alkane Reactions7m
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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
2. Atoms & Elements
The Atom
객관식
Which four elements make up the majority of the human body by mass?
A
Nitrogen, chlorine, magnesium, zinc
B
Calcium, sodium, potassium, iron
C
Oxygen, carbon, hydrogen, nitrogen
D
Carbon, hydrogen, sulfur, phosphorus
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검증된 단계별 안내1
Understand that the question asks for the four elements that constitute the majority of the human body by mass.
Recall that the human body is primarily composed of elements that form organic molecules and water.
Identify that oxygen, carbon, hydrogen, and nitrogen are the most abundant elements in the human body, making up about 96% of its mass.
Recognize that other elements like calcium, sodium, potassium, iron, sulfur, and phosphorus are present but in smaller amounts.
Conclude that the correct set of elements is oxygen, carbon, hydrogen, and nitrogen.
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