객관식
How many neutrons are present in an atom of lithium-7?
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- 1. Intro to General Chemistry3h 46m
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- The Alkyl Groups9m
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- 23. Chemistry of the Nonmetals2h 39m
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- The Electron Configuration Review16m
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- 24. Transition Metals and Coordination Compounds3h 19m
- Atomic Radius & Density of Transition Metals11m
- Electron Configurations of Transition Metals7m
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- Ligands10m
- Complex Ions5m
- Coordination Complexes7m
- Classification of Ligands11m
- Coordination Numbers & Geometry9m
- Naming Coordination Compounds22m
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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
Isotopes
Multiple Choice
How many protons do all isotopes of copper (Cu) have?
A
29
B
30
C
63
D
35
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검증된 단계별 안내1
Recall that the number of protons in an element is defined by its atomic number, which is unique to each element.
Identify copper (Cu) on the periodic table and find its atomic number. This number represents the number of protons in every atom of copper.
Understand that isotopes of an element differ in the number of neutrons, not protons, so all isotopes of copper have the same number of protons.
Note that the atomic number of copper is 29, meaning every copper atom, regardless of isotope, contains 29 protons.
Therefore, the answer to how many protons all isotopes of copper have is the atomic number of copper, which is 29.
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