QQuestionChemistry
QuestionChemistry
How many valence electrons does an atom of rubidium (Rb, atomic number 37) have?
A. One
B. Five
C. Six
D. 37
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Answer
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Step 1Let's solve this step by step:
Step 2: Determine the electron configuration of rubidium
- The electron configuration for rubidium is $$1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6} 5s^{1}
- Rubidium's atomic number is 37, which means it has 37 protons and 37 electrons
Final Answer
One valence electron Explanation: Rubidium has a single valence electron in its 5s orbital, which is characteristic of Group 1 (alkali) metals.
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