7.The classification of elements--The periodic table
- 7.1 Introduction of the lesson Dobereiner’s traids New land’s law of octaves Click here 0 min
- 7.2 Mendeleeff’s periodic tabe Click here 18 min
- 7.3 Modern periodic table Groups and periods Click here 15 min
- 7.4 Metals and Non-metals -variation of atomic radii in period Click here 24 min
- 7.5 Ionization energy Metallic and Non-Metallic Properties Click here 10 min
7.The classification of elements--The periodic table
- 7.1 Introduction of the lesson Dobereiner’s traids New land’s law of octaves Preview 0 min
- 7.2 Mendeleeff’s periodic tabe Preview 18 min
- 7.3 Modern periodic table Groups and periods Preview 15 min
- 7.4 Metals and Non-metals -variation of atomic radii in period Preview 24 min
- 7.5 Ionization energy Metallic and Non-Metallic Properties Preview 10 min