객관식
How many neutrons are present in the most abundant isotope of oxygen?
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- 1. Intro to General Chemistry3h 46m
- Classification of Matter18m
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- 23. Chemistry of the Nonmetals2h 39m
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- Atomic Radius & Density of Transition Metals11m
- Electron Configurations of Transition Metals7m
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- Ligands10m
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- Coordination Numbers & Geometry9m
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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
객관식
In which of the following sets do all species have the same number of protons?
A
H-1, H-2, He-4
B
N-14, O-16, F-19
C
Na-23, Mg-24, Al-27
D
C-12, C-13, C-14
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검증된 단계별 안내1
Recall that the number of protons in an atom is given by its atomic number, which defines the element itself.
Understand that isotopes of the same element have the same number of protons but differ in the number of neutrons, which affects their mass number.
Examine each set by identifying the elements and their atomic numbers (number of protons):
For example, in the set C-12, C-13, C-14, all are carbon isotopes, so they all have the same atomic number (6 protons) but different mass numbers.
Compare this with other sets where different elements are present, meaning different atomic numbers and thus different numbers of protons.
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