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The 3rd energy level is the highest occupied energy level for chlorine with seven electrons.
The highest occupied energy level of Beryllium is the second energy level, denoted as 2.
Aluminum has 3 electrons in its highest occupied energy level.
Sr has two electrons in the 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.
the period number tells which is the highest energy level occupied by the electrons
If you are talking about the ground state, then the quantum numbers for Tin are: n=5 l(lowercase L)=1 m-sub l = 0 m-sub s = 1/2 Learn about the relationship between electron configuration (which you know based off the placement of the element in the periodic table) and quantum numbers if you seek an explanation for this.
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.
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Electrons...MoMMy =)