Key concepts

The electrons surrounding an atom are located in regions about the nucleus dubbed “energy levels”. An power level represents the 3-dimensional an are surrounding the nucleus whereby electrons are most likely to be. The first energy level is closest to the nucleus. The 2nd energy level is a small farther away 보다 the first. The third is a tiny farther away 보다 the second, and also so on.Each power level can accommodate or “hold” a different number of electrons before added electrons start to enter the following level. When the an initial energy level has 2 electrons, the next electrons enter the 2nd energy level till the second level has 8 electrons. When the second energy level has actually 8 electrons, the next electrons go into the third energy level until the 3rd level has actually 8 electrons.When the third energy level has actually 8 electrons, the next 2 electrons go into the fourth power level.The electrons in the energy level farthest from the cell core are referred to as valence electrons.Atoms in the same column (group) in the periodic table have the same number of valence electrons.


Students will again focus on the first 20 elements. Students will an initial look at a diagram and also animation to recognize the simple pattern that the arrangement of electron on power levels around an atom. Students will certainly be offered cards v information around the electrons and also energy levels because that each the the an initial 20 atoms. They will certainly again try to correctly complement the cards v each element.

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Students will have the ability to interpret the information given in the routine table to explain the arrangement of electron on the power levels roughly an atom.


Download the student task sheet, and also distribute one every student when specified in the activity. The activity sheet will certainly serve together the “Evaluate” ingredient of every 5-E lesson plan.

About this Lesson

Be sure that the 20 atom name cards are posted around the room. Friend will need the 5 cards top top the appropriate hand next of each sheet. This class is intended together a follow-up to thing 4, great 2.

For great 4.3, students can play the regular Table Game, video game #2. This is an online variation of the routine table card game from this lesson the you can assign as class work or homework after ~ students have played the game in the classroom.

Have teams work together to location each card with its exactly atom.

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Show students that you have actually 80 cards (4 for each that the very first 20 elements). Prior to distributing the cards, explain that every card contains information around electrons and also energy levels because that the very first 20 facets of the periodic table. The students’ job is to read the card carefully, figure out which facet the card is describing, and also put the card at the spot in the room for that element. Repeat students the they will should count the electron in bespeak to recognize each atom. Once students recognize what their assignment is, distribution the cards come groups.


Have students look at for trends in rows and also columns the the very first 20 facets in the regular table.

Continue to job the image Periodic table of energy levels for elements 1–20 and have college student look at their activity sheets to find patterns in the variety of electrons within each energy level.

Have students look at the periods (rows walk across).

Number of power levels in each period

The atoms in the first period have electrons in 1 power level.The atom in the second duration have electron in 2 energy levels.The atoms in the third duration have electron in 3 energy levels.The atoms in the fourth period have electrons in 4 power levels.

How the electrons to fill in the power levels

First energy level = 1, 2Second power level = 1, 2, 3, …8Third energy level = 1, 2, 3, …8