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What is the principal quantum number (n) for the outermost electron in rubidium

Practice Questions

Q1
What is the principal quantum number (n) for the outermost electron in rubidium (Rb)?
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Questions & Step-by-Step Solutions

What is the principal quantum number (n) for the outermost electron in rubidium (Rb)?
  • Step 1: Find the atomic number of rubidium (Rb). The atomic number is 37.
  • Step 2: Determine the electron configuration of rubidium. The configuration is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹.
  • Step 3: Identify the outermost electron in the electron configuration. The outermost electron is in the 5s orbital.
  • Step 4: Determine the principal quantum number (n) for the outermost electron. The outermost electron is in the 5th shell, so n = 5.
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