6
This would be sulfur, and the third level has 6 electrons. See the diagram linked below
Iron has 26 electrons. The third energy level can hold a maximum of 18 electrons. Therefore, there are 18 electrons on the third energy level of iron.
Chlorine has 7 electrons in its third energy level.
Chlorine has 17 electrons. In the third energy level, there are 7 electrons.
18
Magnesium has two electrons in its first energy level, eight electrons in its second energy level, and two electrons in its third energy level, for a total of 12 electrons.
There is no third energy level of oxygen, there is only two. The second energy level has 6 electrons.
possibly
In oxygen, the third energy level can hold a maximum of 18 electrons. However, oxygen only has 8 electrons in total, so only 2 electrons are found in the third energy level.
There are eight electrons in the third level of a chromium atom.There are four level in the chromium atom, and the fourth level, unfilled, contains 6 out of 18 electrons, in the neutral, non-ionized atom.
2 electrons are in magnesiums last energy level
18 electrons.