which diagram shows the correct distribution of electrons in the electron shells of an aluminum atom?
which diagram shows the correct distribution of electrons in the electron shells of an aluminum atom?
Answer
Explanation:
Step1: Recall atomic number of aluminum
Aluminum has an atomic number of 13, so it has 13 electrons.
Step2: Determine electron - shell distribution rules
The first shell can hold a maximum of 2 electrons, the second shell can hold a maximum of 8 electrons, and the remaining electrons go to the third shell.
Step3: Calculate electron distribution
2 electrons go to the first shell, 8 electrons go to the second shell, and 13 - 2 - 8=3 electrons go to the third shell.
Answer:
The diagram with 2 electrons in the innermost shell, 8 electrons in the second - shell, and 3 electrons in the third shell.