Key ideas

The electrons neighboring an atom are located in regions roughly the nucleus called “energy levels”. An power level to represent the 3-dimensional space surrounding the nucleus where electrons space most likely to be. The first energy level is closest come the nucleus. The 2nd energy level is a little farther away 보다 the first. The third is a little farther away than the second, and so on.Each energy level can accommodate or “hold” a different variety of electrons before added electrons begin to get in the next level. As soon as the very first energy level has 2 electrons, the next electrons get in the 2nd energy level until the second level has 8 electrons. Once the second energy level has actually 8 electrons, the next electrons get in the third energy level till the third level has 8 electrons.When the 3rd energy level has 8 electrons, the following 2 electrons enter the fourth power level.The electrons in the energy level the furthest from the nucleus are dubbed valence electrons.Atoms in the same column (group) in the regular table have the same number of valence electrons.

Summary

Students will again focus on the first 20 elements. Student will an initial look in ~ a diagram and animation to understand the simple pattern that the plan of electrons on energy levels about an atom. Students will certainly be provided cards v information about the electrons and energy levels because that each that the an initial 20 atoms. They will again shot to correctly complement the cards through each element.

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Objective

Students will be able to interpret the information given in the regular table to explain the arrangement of electron on the power levels around an atom.

Evaluation

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

About this Lesson

Be sure that the 20 atom name cards are posted approximately the room. You will require the five cards on the ideal hand side of each sheet. This great is intended as a follow-up to thing 4, class 2.

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


Have teams work with each other to ar each card v its correct atom.

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Show students that you have 80 cards (4 because that each that the very first 20 elements). Before distributing the cards, define that each card has information around electrons and energy levels because that the very first 20 facets of the regular table. The students’ task is to check out the card carefully, figure out which facet the card is describing, and also put the map at the point out in the room for that element. Remind students that they will need to count the electron in stimulate to identify each atom. When students know what your assignment is, distribution the cards to groups.

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Have students watch for fads in rows and columns of the very first 20 aspects in the regular table.

Continue to task the photo Periodic table of power levels for facets 1–20 and have college student look in ~ their task sheets to discover patterns in the variety of electrons within each energy level.

Have student look at the periods (rows walking across).

Number of power levels in each period

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

How the electrons to fill in the power levels

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