Determine the number of core, valence, and unpaired electrons for aluminum.

• A. 10 core electrons, 3 valence electrons, 1 unpaired electron
• B. 10 core electrons, 5 valence electrons, 5 unpaired electron
• C. 13 core electrons, 10 valence electrons, 3 unpaired electrons
• D. 2 core electrons, 11 valence electrons, 5 unpaired electrons

Answer: (A)