At the end of this activity, students should be able to: û give the criteria for the classification of the elements in the periodic table û state the group in which a given element occurs on the basis of the number of its valence electrons, and vice versa û state the period in which a given element occurs on the basis of the number of electron shells, and vice versa û determine whether a given element is a metal, a metalloid or a nonmetal from its position in the periodic table û give examples of similarities in the properties of elements within a given main group û give examples of periodic changes in the properties of elements that occur in the same period.

Originally released by Learnetic, 2016.