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	The Periodic Table: Crash Course Chemistry #4 (CrashCourse) View
	Unit 4: History of the Periodic Table (BrownShu Science) View
	RC Unit 4: History of the Periodic Table - Part 1 (William Kane) View
	Unit 4 VL 1 - History of the Periodic Table.wmv (Eric Watt) View
	The Periodic Table: Atomic Radius, Ionization Energy, and Electronegativity (Professor Dave Explains) View
	RC Unit 4: History of the Periodic Table - Part 2 (William Kane) View
	History of Periodic Table Animation (Aya Nasser) View
	4.1 - Periodic Table History (SaberChem) View
	Unit 4 The Periodic Table Recording 1 Periodic Table History and Group Trends (DTMChemistry) View
	Unit 4 Video Lecture 1 - History of PT (Eric Watt) View