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01:42 Physical Science Dysprosium - Periodic Table of Videos Lesson duration 01:42 Manage Library 171,873 Views
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03:37 Physical Science Ytterbium - Periodic Table of Videos Lesson duration 03:37 Manage Library 161,779 Views
01:34 Physical Science Lutetium - Periodic Table of Videos Lesson duration 01:34 Manage Library 135,442 Views
00:50 Physical Science Hafnium - Periodic Table of Videos Lesson duration 00:50 Manage Library 166,226 Views
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