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What is the mass number for an atom of xenon containing 54 protons and 75 neutrons?
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Indice
- 1. Intro to General Chemistry4h 5m
- Classification of Matter18m
- Physical & Chemical Changes19m
- Chemical Properties7m
- Physical Properties6m
- Intensive vs. Extensive Properties15m
- Temperature13m
- Scientific Notation13m
- SI Units8m
- Metric Prefixes26m
- Significant Figures9m
- Significant Figures: Precision in Measurements9m
- Significant Figures: In Calculations17m
- Conversion Factors16m
- Dimensional Analysis24m
- Density12m
- Density of Geometric Objects19m
- Density of Non-Geometric Objects6m
- 2. Atoms & Elements4h 40m
- The Atom10m
- Subatomic Particles17m
- Isotopes17m
- Ions27m
- Atomic Mass32m
- Periodic Table: Classifications15m
- Periodic Table: Group Names8m
- Periodic Table: Representative Elements & Transition Metals7m
- Periodic Table: Element Symbols6m
- Periodic Table: Elemental Forms6m
- Periodic Table: Phases9m
- Periodic Table: Charges20m
- Calculating Molar Mass10m
- Mole Concept31m
- Law of Conservation of Mass5m
- Law of Definite Proportions12m
- Atomic Theory9m
- Law of Multiple Proportions8m
- Millikan Oil Drop Experiment8m
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- 3. Chemical Reactions4h 34m
- Empirical Formula18m
- Molecular Formula21m
- Combustion Analysis39m
- Combustion Apparatus16m
- Polyatomic Ions25m
- Naming Ionic Compounds12m
- Writing Ionic Compounds8m
- Naming Ionic Hydrates8m
- Naming Acids23m
- Naming Molecular Compounds8m
- Balancing Chemical Equations14m
- Stoichiometry20m
- Limiting Reagent18m
- Percent Yield21m
- Mass Percent6m
- Functional Groups in Chemistry11m
- 4. BONUS: Lab Techniques and Procedures1h 30m
- 5. BONUS: Mathematical Operations and Functions52m
- 6. Chemical Quantities & Aqueous Reactions4h 17m
- Solutions9m
- Molarity22m
- Osmolarity15m
- Dilutions15m
- Solubility Rules16m
- Electrolytes24m
- Molecular Equations21m
- Gas Evolution Equations13m
- Solution Stoichiometry14m
- Complete Ionic Equations18m
- Calculate Oxidation Numbers16m
- Redox Reactions20m
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- Chemistry Gas Laws: Combined Gas Law14m
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- 9. Quantum Mechanics3h 7m
- Wavelength and Frequency6m
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- 10. Periodic Properties of the Elements3h 49m
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- The Electron Configurations: Exceptions17m
- The Electron Configuration: Ions12m
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- 12. Molecular Shapes & Valence Bond Theory2h 11m
- 13. Liquids, Solids & Intermolecular Forces2h 45m
- Molecular Polarity10m
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- 15. Chemical Kinetics3h 2m
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- 17. Acid and Base Equilibrium5h 5m
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- 18. Aqueous Equilibrium4h 47m
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- Band of Stability: Alpha Decay & Nuclear Fission10m
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- Mass Defect19m
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- 22. Organic Chemistry5h 4m
- Introduction to Organic Chemistry8m
- Structural Formula8m
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- Skeletal Formula6m
- Spatial Orientation of Bonds3m
- Intro to Hydrocarbons16m
- Isomers11m
- Chirality12m
- Functional Groups in Chemistry11m
- Naming Alkanes4m
- The Alkyl Groups9m
- Naming Alkanes with Substituents13m
- Naming Cyclic Alkanes6m
- Naming Other Substituents8m
- Naming Alcohols11m
- Naming Alkenes11m
- Naming Alkynes9m
- Naming Ketones5m
- Naming Aldehydes5m
- Naming Carboxylic Acids4m
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- Naming Ethers5m
- Naming Amines5m
- Naming Benzene7m
- Alkane Reactions7m
- Intro to Addition Reactions4m
- Halogenation Reactions4m
- Hydrogenation Reactions3m
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- Alcohol Reactions: Substitution Reactions4m
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- Aldehydes and Ketones Reactions6m
- Ester Reactions: Esterification4m
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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
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Which part of an atom contains most of its mass?
A
Protons only
B
Neutrons only
C
Electron cloud
D
Nucleus
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Guida verificata passo dopo passo1
Recall the basic structure of an atom, which consists of a nucleus and an electron cloud surrounding it.
Understand that the nucleus contains protons and neutrons, while the electron cloud contains electrons.
Know that protons and neutrons have much greater mass compared to electrons; electrons have negligible mass in comparison.
Since both protons and neutrons are located in the nucleus, the nucleus contains most of the atom's mass.
Therefore, the correct answer is that the nucleus contains most of the atom's mass.
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