QQuestionChemistry
QuestionChemistry
What is the number of valence electrons in a sodium ion (Na + 1 )? (atomic number of Na = 11)
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Answer
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Step 1:I'll solve this problem step by step, following the LaTeX formatting guidelines precisely:
Step 2:: Determine the electron configuration of sodium (Na)
- The electron configuration of sodium is $$1s^{2} 2s^{2} 2p^{6} 3s^{1}
- The atomic number of sodium is 11, which means it has 11 electrons
Step 3:: Understand the ion formation
- When sodium forms a positive ion (Na⁺), it loses one electron - The lost electron comes from the outermost shell (3s orbital)
Step 4:: Calculate valence electrons in Na⁺
- When sodium becomes Na⁺, it loses this $$1$$ electron
- Valence electrons are the electrons in the outermost shell
Step 5:: Determine the number of valence electrons in Na⁺
- Valence electrons in Na⁺ = $$0
Final Answer
The number of valence electrons in a sodium ion (Na⁺) is 0.
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