Question Video: Determining the Distribution of Five Electrons among the Energy Levels of an Atom | Nagwa Question Video: Determining the Distribution of Five Electrons among the Energy Levels of an Atom | Nagwa

Question Video: Determining the Distribution of Five Electrons among the Energy Levels of an Atom Science • First Year of Preparatory School

An atom contains 5 electrons. How many of these electrons occupy the L energy level?

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Video Transcript

An atom contains five electrons. How many of these electrons occupy the L energy level?

Energy levels are distances from the nucleus that describe the location of electrons. The first energy level is called K, the second energy level is L, and the third and fourth are M and N, respectively. Energy level K can hold a maximum of two electrons, L holds a maximum of eight, and M and N hold a maximum of 18 and 32, respectively. Electrons fill from the lowest energy level first, which is K.

The question tells us that the atom contains five electrons. Two of these electrons fill energy level K. The remaining three electrons fill the second lowest energy level L. Thus, the answer to the question “How many of these electrons occupy the L energy level?” is three electrons.

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