객관식
Which four elements make up the majority of the human body by mass?
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- 1. Intro to General Chemistry3h 58m
- Classification of Matter18m
- Physical & Chemical Changes19m
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- 10. Periodic Properties of the Elements3h 45m
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- Spatial Orientation of Bonds3m
- Intro to Hydrocarbons16m
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- Functional Groups in Chemistry11m
- Naming Alkanes4m
- The Alkyl Groups9m
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- Alkane Reactions7m
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- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
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- The Electron Configuration Review16m
- Periodic Table Charges Review20m
- Hydrogen Isotopes4m
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- Production of Hydrogen8m
- Group 1A and 2A Reactions7m
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- Borane Reactions7m
- Nitrogen Family Reactions12m
- Oxides, Peroxides, and Superoxides12m
- Oxide Reactions4m
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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
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- 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 of the following is the smallest unit of an element that retains the chemical properties of that element?
A
Molecule
B
Proton
C
Atom
D
Electron
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검증된 단계별 안내1
Understand the question: It asks for the smallest unit of an element that retains the chemical properties of that element.
Recall definitions: A proton is a subatomic particle found in the nucleus, but alone it does not represent the element's chemical properties.
Consider electrons: Electrons are subatomic particles involved in chemical reactions, but an electron alone does not define an element.
Examine molecules: Molecules are combinations of atoms bonded together, so they are larger than atoms and may contain multiple elements.
Identify the atom: An atom is the smallest unit of an element that retains all the chemical properties of that element, as it contains protons, neutrons, and electrons arranged in a way that defines the element.
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