객관식
How many electrons are present in a neutral atom of copper (Cu)?
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- 1. Intro to General Chemistry3h 46m
- Classification of Matter18m
- Physical & Chemical Changes19m
- Chemical Properties7m
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- 10. Periodic Properties of the Elements3h 10m
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- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
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- The Electron Configuration Review16m
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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
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- Paramagnetism and Diamagnetism10m
- Ligands10m
- Complex Ions5m
- Coordination Complexes7m
- Classification of Ligands11m
- Coordination Numbers & Geometry9m
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- Isomerism in Coordination Complexes17m
- Orientations of D Orbitals4m
- Intro to Crystal Field Theory10m
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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
객관식
Where is most of the mass of an atom located?
A
In the electron cloud
B
In the outermost shell
C
Evenly distributed throughout the atom
D
In the nucleus
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검증된 단계별 안내1
Recall the basic structure of an atom, which consists of a nucleus at the center and electrons surrounding it in the electron cloud.
Understand that the nucleus contains protons and neutrons, which are much more massive than electrons.
Recognize that electrons have very little mass compared to protons and neutrons, so the electron cloud contributes very little to the total mass of the atom.
Note that the outermost shell refers to the region where electrons are found, which again have negligible mass compared to the nucleus.
Conclude that since protons and neutrons are concentrated in the nucleus and have most of the atom's mass, most of the mass of an atom is located in the nucleus.
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