That some of the aliens in columns 6, 7 and 8 of the cards only have one eye. A variation of this lesson would to have students predict aliens that would fit in period 6 and/or family 9.An example of an incorrect alien table is included (PowerPoint slide #5).The hair or number of legs or foot length increases as you move from top to bottom (this represents energy level of atoms). ![]() The number of fingers increases as you move from left to right (this represents number of valence electrons). ![]() The final table has five periods and eight groups (families).The teacher removes two cards from each deck and has the students group the cards look for pattern and finally draw the missing aliens.This helps students keep track of their cards. The teacher could print the cards on colored card stock and laminate them.This activity is similar to what Mendeleev had to do to predict the yet undiscovered elements on the periodic table by using the properties of the elements around it.No safety precautions need to be noted for this activity.A stack of alien cards (see PowerPoint to create class sets-slides # 1&2 or 7&8).This lesson supports students’ understanding of Understand how the periodic table is organized by organizing drawings of aliens. ![]() The teacher can remove two cards from each student’s deck, and after they organize the cards the students can predict (draw) the missing aliens.īy the end of this lesson, students should be able to In this activity, students organize alien cards into groups and periods following trends, similar to how the periodic table is put together.
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