객관식
Which elements are most likely to react in the same manner in a chemical reaction?
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- 1. Intro to General Chemistry3h 46m
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- 24. Transition Metals and Coordination Compounds3h 19m
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- Ligands10m
- Complex Ions5m
- Coordination Complexes7m
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- Coordination Numbers & Geometry9m
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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
10. Periodic Properties of the Elements
Valence Electrons of Elements
Multiple Choice
How many valence electrons does a nitrogen atom have?
A
2
B
7
C
3
D
5
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검증된 단계별 안내1
Recall that valence electrons are the electrons in the outermost shell (energy level) of an atom that participate in chemical bonding.
Identify the atomic number of nitrogen, which is 7, meaning it has 7 electrons in total.
Determine the electron configuration of nitrogen: \$1s^2 2s^2 2p^3$.
Recognize that the first shell (1s) is full with 2 electrons and the valence electrons are those in the second shell (2s and 2p orbitals).
Count the electrons in the second shell: \$2s^2\( (2 electrons) plus \)2p^3$ (3 electrons), totaling 5 valence electrons.
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