QQuestionAnatomy and Physiology
QuestionAnatomy and Physiology
Based on the electron configuration, how many valence electrons are in calcium, Ca?
1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
A. 4
B. 20
C. 2
D. 1
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Answer
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Step 1Let's solve this step by step:
Step 2: Understand the electron configuration
1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2}
The given electron configuration for calcium (Ca) is:
Final Answer
Explanation: - Calcium is in Group 2 (alkaline earth metals) - Elements in Group 2 typically have 2 valence electrons in their outermost s orbital - The 4s² configuration directly shows 2 valence electrons - These 2 electrons are the ones involved in chemical bonding and determining the element's chemical properties
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