Multiple Choice
A copper penny has a net charge of -3.2 × 10^{-19} C. How many electrons were transferred to create this charge on the penny?
Table of contents
- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
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- 22. Organic Chemistry5h 7m
- Introduction to Organic Chemistry8m
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- Intro to Hydrocarbons16m
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- The Alkyl Groups9m
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- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
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- 24. Transition Metals and Coordination Compounds3h 19m
- Atomic Radius & Density of Transition Metals11m
- Electron Configurations of Transition Metals7m
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- Ligands10m
- Complex Ions5m
- Coordination Complexes7m
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- Coordination Numbers & Geometry9m
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- Intro to Crystal Field Theory10m
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- 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
How many electrons does a neutral lithium atom have?
A
5
B
3
C
7
D
1
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Verified step by step guidance1
Recall that a neutral atom has an equal number of protons and electrons.
Identify the atomic number of lithium, which is the number of protons in its nucleus. Lithium's atomic number is 3.
Since lithium is neutral, the number of electrons must be equal to the number of protons.
Therefore, the number of electrons in a neutral lithium atom is equal to its atomic number, which is 3.
Conclude that a neutral lithium atom has 3 electrons.
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