Curated OER
Nuclear Arithmetic
In "Nuclear Arthmetic," first-time physical scientists examine atomic structure and the periodic table of elements. The are given the formula, "N = A-Z," in which N is the number of neutrons, A is the atomic mass, and Z is the atomic...
Curated OER
Arranging the Elements
Students describe how elements are arranged in the periodic table. They compare metals, nonmetals, and metalloids based on their properties and on their location in the periodic table. Finally, students identify and describe the...
Curated OER
It's the Law: Periodically
Ninth graders examine the Periodic Table. In this element instructional activity, 9th graders observe the chemical reactivity of elements. They graph the properties and discuss the trend in the group and period of elements. The students...