| Select | | View | Download | | 25.1 Electronegativity of an atom | | |
| 25.2 Polarity of bond | | |
| 25.3 Polarity of molecule | | |
| 25.1 Electronegativity of an atom (bilingual version) | | |
| 25.2 Polarity of bond (bilingual version) | | |
| 25.3 Polarity of molecule (bilingual version) | | |
| Polarity of bond and molecule (combined version) | | |
| Polarity of bond and molecule (bilingual, combined version) | | |