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	Periodicity (Bozeman Science) View
	The Periodic Table: Atomic Radius, Ionization Energy, and Electronegativity (Professor Dave Explains) View
	Periodic Trends - Atomic Radius, Electronegativity, Ionization Energy - Chemistry Series (Medicosis Perfectionalis) View
	Atomic Radius - Basic Introduction - Periodic Table Trends, Chemistry (The Organic Chemistry Tutor) View
	Trends in the Periodic Table (Duell Chemistry) View
	The Periodic Table: Crash Course Chemistry #4 (CrashCourse) View
	Electronegativity, Basic Introduction, Periodic Trends - Which Element Is More Electronegative (The Organic Chemistry Tutor) View
	The genius of Mendeleev's periodic table - Lou Serico (TED-Ed) View
	Periodic Table of Elements in Order (The Big Boys) View
	The most dangerous elements on the periodic table - Shannon Odell (TED-Ed) View