Multiple Choice
How many neutrons does a lithium atom with a mass number of 7 have?
Table of contents
- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
- Physical & Chemical Changes19m
- Chemical Properties7m
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- Intensive vs. Extensive Properties13m
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- 2. Atoms & Elements4h 16m
- The Atom9m
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- 22. Organic Chemistry5h 7m
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- Intro to Hydrocarbons16m
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- Chirality15m
- Functional Groups in Chemistry11m
- Naming Alkanes4m
- The Alkyl Groups9m
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- Naming Carboxylic Acids4m
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- 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
- Hydrogen Compounds11m
- Production of Hydrogen8m
- Group 1A and 2A Reactions7m
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- Noble Gas Compounds3m
- 24. Transition Metals and Coordination Compounds3h 16m
- Atomic Radius & Density of Transition Metals11m
- Electron Configurations of Transition Metals7m
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- 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 Complexes14m
- 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
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many neutrons does a sodium (Na) atom typically have?
A
11 neutrons
B
13 neutrons
C
12 neutrons
D
14 neutrons
Verified step by step guidance1
Identify the atomic number of sodium (Na) from the periodic table. Sodium has an atomic number of 11, which means it has 11 protons.
Determine the mass number of a typical sodium atom. The most common isotope of sodium is sodium-23, which has a mass number of 23.
Use the formula to find the number of neutrons: \( \text{Number of neutrons} = \text{Mass number} - \text{Atomic number} \).
Substitute the values into the formula: \( \text{Number of neutrons} = 23 - 11 \).
Calculate the result from the substitution to find the number of neutrons in a typical sodium atom.
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