08:34The Periodic Table EXPLAINED | Chemical Families and Periodic TrendsThe Science Classroom715views
24:55Periodic Trends: Electronegativity, Ionization Energy, Atomic Radius - TUTOR HOTLINEMelissa Maribel265views
07:53The Periodic Table: Atomic Radius, Ionization Energy, and ElectronegativityProfessor Dave Explains512views