QQuestionAnatomy and Physiology
QuestionAnatomy and Physiology
"How many valence electrons does barium have, and what energy levels do they occupy?
A. One valence electron in the 6s state
B. Two valence electrons in 6s states
C. No valence electrons"
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Answer
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Step 1I'll solve this step-by-step following the precise LaTeX and formatting guidelines:
Step 2: Determine Barium's Electron Configuration
- Its electron configuration is $$1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6} 5s^{2} 4d^{10} 5p^{6} 6s^{2}
- Barium's atomic number is 56
Final Answer
Two valence electrons in 6s states Key Insight: The 6s^{2} configuration is characteristic of Group 2 (alkaline earth metals) elements like barium, which always have two valence electrons in their outermost s orbital.
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