QQuestionChemistry
QuestionChemistry
Determine the number of valence electrons for aluminum using the provided table.
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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:: Identify the Element
Aluminum (Al) is a metallic element located in the periodic table. To determine its valence electrons, we need to look at its position in the periodic table.
Step 3:: Locate Aluminum's Position
Aluminum is in: - Group 13 (also known as IIIA) - Period 3 - Atomic number 13
Step 4:: Determine Valence Electrons
\text{Valence Electrons} = 13 - 10 = 3
For main group elements (groups 1 - 2 and 13 - 18), the number of valence electrons is typically equal to the group number minus 10 for groups 13 - 18. For Group 13 (IIIA):
Step 5:: Verify the Electron Configuration
Aluminum's electron configuration is $$1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{1}
The electrons in the outermost shell (3s and 3p) are the valence electrons.
Final Answer
Aluminum has 3 valence electrons.
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