ALLGOOD, ASHTON. "PBS Chemistry Chapter 04, Lesson 03 - Trends in the Periodic Table". OER Commons. Institute for the Study of Knowledge Management in Education, 02 Dec. 2019. Web. 25 Nov. 2024. <https://goopennc.oercommons.org/authoring/2769-pbs-chemistry-chapter-04-lesson-03-trends-in-the-p>.
ALLGOOD, A. (2019, December 02). PBS Chemistry Chapter 04, Lesson 03 - Trends in the Periodic Table. OER Commons. Retrieved November 25, 2024, from https://goopennc.oercommons.org/authoring/2769-pbs-chemistry-chapter-04-lesson-03-trends-in-the-p.