# Question Video: Determining How Many Electrons Are Needed to Fill Energy Levels K and L Science

In total, how many electrons are needed for both the K and L energy levels to be full?

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### Video Transcript

In total, how many electrons are needed for both the K and L energy levels to be full?

Energy levels are defined as distances from the nucleus that describe the location of electrons. The first four energy levels are called K, L, M, and N. Each energy level holds a different maximum number of electrons. The maximum number of electrons for energy level K is two, L is eight, M is 18, and N is 32.

The question asks how many electrons are needed for both the K and L energy levels to be full. As two electrons are needed for K to be full and eight electrons are needed for L to be full, then two plus eight electrons are needed for K and L to be full. Two electrons plus eight electrons equals 10 electrons. Thus, the answer to the question “how many electrons are needed for both the K and L energy levels to be full?” is 10 electrons.