QQuestionChemistry
QuestionChemistry
According to its periodic table entry, how many electrons does nickel have in its valence level?
A. 2
B. 8
C. 16
D. 28
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Answer
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Step 1:I'll solve this step-by-step using the periodic table and electron configuration principles:
Step 2:: Identify Nickel's Position on the Periodic Table
- Nickel (Ni) is located in Period 4, Group 10 - Its atomic number is 28
Step 3:: Determine Electron Configuration
- The electron configuration of nickel is $$1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{8}
Step 4:: Identify Valence Electrons
- Counting these electrons: $$4s^{2} + 3d^{8} = 2 + 8 = 10$$ electrons
- Valence electrons are those in the outermost shell that participate in chemical bonding
Step 5:: Verify the Answer
- The number of valence electrons for nickel is 10 - However, the given options do not include 10
Step 6:: Adjust Calculation
- Traditionally, for transition metals, only the $$4s$$ electrons are typically counted as valence electrons
- 4s^{2} = 2 electrons
Final Answer
B. 8 (technically 2, but the closest option is 8)
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