What is a valence electrons? How do you figure out how many valence electrons there are? Is there a pattern on the periodic table?
This assignment was written for a general science class to learn about the patterns of the periodic table. It teaches the basic principle of finding the number of valence electrons from drawing atomic structures.
By the time students complete this assignment, students see the pattern that any element in family 1 will have one valence electron. They will see that any element in family 2 will have two valence electrons. Any element in family 13 will have three valence electrons. Any element in family 14 will have four valence electrons and so on until reaching family eighteen which will have eight valence electrons except for Helium.
This assignment starts a good conversation about what it means to have a stable octet and it's a spring board into oxidation numbers and beginning bonding.