Multiple Choice
How many valence electrons does an aluminum (Al) atom have?
Table of contents
- 1. Intro to General Chemistry3h 48m
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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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- Paramagnetism and Diamagnetism10m
- Ligands10m
- Complex Ions5m
- Coordination Complexes7m
- Classification of Ligands11m
- Coordination Numbers & Geometry9m
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- Isomerism in Coordination Complexes17m
- Orientations of D Orbitals4m
- 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
10. Periodic Properties of the Elements
Valence Electrons of Elements
Multiple Choice
How many valence electrons does a single chlorine (Cl) atom possess?
A
5
B
7
C
1
D
8
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Verified step by step guidance1
Identify the element in question, which is chlorine (Cl).
Determine the atomic number of chlorine, which is 17, meaning it has 17 electrons in total.
Recall that valence electrons are the electrons in the outermost shell (energy level) of an atom.
Write the electron configuration of chlorine: \$1s^2 2s^2 2p^6 3s^2 3p^5$.
Count the electrons in the outermost shell (the third shell): \$3s^2\( and \)3p^5\( add up to \)2 + 5 = 7$ valence electrons.
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