Q: Will students need to understand that the 3rd shell can hold up to 18 electrons when there are additional outer shells in the atom or should they just understand that it holds 8 electrons for the 8 elements in the 3rd period/row? I just noticed that the study guide lists 18 electrons but the basic bohr model uses only 8 electrons if we are only drawing up to the third row.
A: Students should know that the Bohr model only covers atoms with up to eight electrons in the outer shell, but that there are elements that may contain more. I hope that answers the question!
