visualizações
The Periodic Table Song (2018 Update!) | SCIENCE SONGS
The Periodic Table: Crash Course Chemistry #4
The Periodic Table first 20 elements
The periodic table first 30
SLOW "The NEW Periodic Table Song (In Order)" (AsapSCIENCE 2013)
Hard/Soft Acid-Base Theory
Groups of the periodic table | Periodic table | Chemistry | Khan Academy
The periodic table | Atoms, elements, and the periodic table | High school chemistry | Khan Academy