객관식
Which of the following best describes the difference between a molecule and an atom?
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- 1. Intro to General Chemistry3h 46m
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- Naming Alkanes4m
- The Alkyl Groups9m
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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
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- Group 1A and 2A Reactions7m
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- 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 Summary8m
- Magnetic Properties of Complex Ions9m
- Strong-Field vs Weak-Field Ligands6m
- Magnetic Properties of Complex Ions: Octahedral Complexes11m
2. Atoms & Elements
The Atom
Multiple Choice
How many electrons are present in a neutral atom of phosphorus?
A
31
B
14
C
15
D
16
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검증된 단계별 안내1
Recall that in a neutral atom, the number of electrons is equal to the number of protons.
Identify the atomic number of phosphorus, which represents the number of protons in the nucleus of the atom.
Look up the atomic number of phosphorus on the periodic table; phosphorus has an atomic number of 15.
Since the atom is neutral, the number of electrons must also be 15 to balance the positive charge of the protons.
Therefore, the number of electrons in a neutral phosphorus atom is equal to its atomic number, which is 15.
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