Question

1. choose the best answer. which of these is the correct bohr model for aluminum?

Explanation:

Aluminum has an atomic number of 13, meaning it has 13 electrons. Bohr models follow the electron shell filling rule: the first shell holds max 2 electrons, the second holds max 8, and the third holds the remaining 3 (13-2-8=3). Counting electrons in each option:

1. First model: 2 + 8 = 10 electrons (incorrect)
2. Second model: 2 + 8 + 3 = 13 electrons (correct)
3. Third model: 2 + 8 + 4 = 14 electrons (incorrect)
4. Fourth model: far more than 13 electrons (incorrect)

Answer:

The second option (the model with 2 electrons in the innermost shell, 8 in the middle shell, and 3 in the outermost shell)