2s2
Aluminum has 3 electrons in its highest occupied energy level.
Helium is the noble gas that does not have eight electrons in its highest occupied energy level. It only has two electrons in its outermost energy level.
8
In a ground state atom of strontium (Sr), which has an atomic number of 38, the highest occupied energy level is the 5s orbital. The electron configuration of strontium is [Kr] 5s², indicating that the 5s level is the outermost energy level containing electrons. Thus, the highest occupied energy level is n=5, corresponding to the 5s subshell.
Yttrium (Y) has an atomic number of 39, indicating it has 39 electrons. The electron configuration of yttrium is [Kr] 5s² 4d¹. The highest occupied energy level for yttrium is the 5th energy level, which contains 2 electrons in the 5s subshell. Therefore, there are 2 electrons in the highest occupied energy level of yttrium.
The highest occupied energy level in Beryllium is the 2s orbital. Beryllium has 4 electrons, with 2 electrons in the 1s orbital and 2 electrons in the 2s orbital.
2s
The 3rd energy level is the highest occupied energy level for chlorine with seven electrons.
Sr has two electrons in the highest occupied energy level
Aluminum has 3 electrons in its highest occupied energy level.
Phosphorus has 5 electrons in its highest occupied energy level.
Xenon has a total of 54 electrons. The highest occupied energy level of xenon is the 5th energy level, which can hold a maximum of 18 electrons. Therefore, on the highest occupied energy level of xenon, there are 18 electrons.
1s
2
Helium is the noble gas that does not have eight electrons in its highest occupied energy level. It only has two electrons in its outermost energy level.
7 electrons would be in the highest occupied energy level of a 7A element. Group 7A elements have 7 valence electrons, which occupy the highest energy level of the atom.
the period number tells which is the highest energy level occupied by the electrons