Multiple Choice
Which term describes the region surrounding the nucleus where electrons are most likely to be found?
Table of contents
- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
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- 22. Organic Chemistry5h 7m
- Introduction to Organic Chemistry8m
- Structural Formula8m
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- Skeletal Formula6m
- Spatial Orientation of Bonds3m
- Intro to Hydrocarbons16m
- Isomers11m
- Chirality15m
- Functional Groups in Chemistry11m
- Naming Alkanes4m
- The Alkyl Groups9m
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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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- Nitrogen Family Reactions12m
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- 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
- 1. The Chemical World10m
2. Atoms & Elements
The Atom
Multiple Choice
What is the mass number of an atom that contains 5 protons and 7 neutrons?
A
2
B
7
C
5
D
12
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Verified step by step guidance1
Identify the number of protons in the atom, which is given as 5. The number of protons defines the atomic number.
Identify the number of neutrons in the atom, which is given as 7.
Recall that the mass number of an atom is the sum of the number of protons and neutrons in its nucleus.
Write the formula for the mass number: \(\text{Mass Number} = \text{Number of Protons} + \text{Number of Neutrons}\).
Substitute the given values into the formula: \(\text{Mass Number} = 5 + 7\).
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