객관식
Which property of carbon-14 allows scientists to use it for dating dead organisms?
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- 1. Intro to General Chemistry3h 46m
- Classification of Matter18m
- Physical & Chemical Changes19m
- Chemical Properties7m
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- The Atom9m
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- 10. Periodic Properties of the Elements3h 10m
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- 22. Organic Chemistry5h 7m
- Introduction to Organic Chemistry8m
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- Spatial Orientation of Bonds3m
- Intro to Hydrocarbons16m
- Isomers11m
- Chirality15m
- Functional Groups in Chemistry11m
- Naming Alkanes4m
- The Alkyl Groups9m
- Naming Alkanes with Substituents13m
- Naming Cyclic Alkanes6m
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- Naming Benzene7m
- Alkane Reactions7m
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- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
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- Main Group Elements: Density11m
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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
- Boron Family Reactions7m
- Boron Family: Borane7m
- Borane Reactions7m
- Nitrogen Family Reactions12m
- Oxides, Peroxides, and Superoxides12m
- Oxide Reactions4m
- Peroxide and Superoxide Reactions6m
- 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
Isotopes
Multiple Choice
An atom has an atomic number of 6 and a mass number of 14. How many neutrons does this atom have?
A
8
B
14
C
20
D
6
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검증된 단계별 안내1
Identify the atomic number and mass number given in the problem. The atomic number (Z) is 6, and the mass number (A) is 14.
Recall that the atomic number represents the number of protons in the atom. So, the number of protons is 6.
Understand that the mass number is the total number of protons and neutrons in the nucleus of the atom.
Use the formula to find the number of neutrons (N): \(N = A - Z\), where \(A\) is the mass number and \(Z\) is the atomic number.
Substitute the values into the formula: \(N = 14 - 6\), which gives the number of neutrons.
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