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How do atoms of copper differ from atoms of aluminum?
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- 1. Intro to General Chemistry3h 46m
- Classification of Matter18m
- Physical & Chemical Changes19m
- Chemical Properties7m
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- 2. Atoms & Elements4h 17m
- The Atom9m
- Subatomic Particles15m
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- Periodic Table: Classifications11m
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- 10. Periodic Properties of the Elements3h 10m
- The Electron Configuration22m
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- 12. Molecular Shapes & Valence Bond Theory1h 58m
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- Molecular Polarity10m
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- 15. Chemical Kinetics2h 53m
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- 17. Acid and Base Equilibrium5h 5m
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- 18. Aqueous Equilibrium4h 47m
- Intro to Buffers20m
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- 22. Organic Chemistry5h 7m
- Introduction to Organic Chemistry8m
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- Skeletal Formula6m
- 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 Alcohols11m
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- Naming Ketones5m
- Naming Aldehydes5m
- Naming Carboxylic Acids4m
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- Naming Ethers5m
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- Naming Benzene7m
- Alkane Reactions7m
- Intro to Addition Reactions4m
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- Hydrogenation Reactions3m
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- Aldehydes and Ketones Reactions6m
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- Amide Formation4m
- Benzene Reactions10m
- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
- Main Group Elements: Boiling & Melting Points7m
- Main Group Elements: Density11m
- Main Group Elements: Periodic Trends7m
- The Electron Configuration Review16m
- Periodic Table Charges Review20m
- Hydrogen Isotopes4m
- Hydrogen Compounds11m
- 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
- Crystal Field Theory: Tetrahedral Complexes4m
- 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
The Atom
Multiple Choice
An atom of an element contains 14 protons. Which element is it?
A
Phosphorus
B
Magnesium
C
Silicon
D
Nitrogen
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검증된 단계별 안내1
Recall that the identity of an element is determined by its atomic number, which is the number of protons in its nucleus.
Identify the atomic number given in the problem: the atom contains 14 protons, so its atomic number is 14.
Use the periodic table to find the element with atomic number 14. Each element is uniquely identified by its atomic number.
Locate atomic number 14 on the periodic table, which corresponds to the element Silicon (Si).
Conclude that the element with 14 protons is Silicon.
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