STUDENT SPACE · TOPIC 5
Multiple bonds and larger molecules
Draw the Extended covalent molecules and check their bonding and lone pairs.
The essentials
- A double bond contains two shared pairs of electrons. A triple bond contains three shared pairs.
- O₂ has a double bond. N₂ has a triple bond. CO₂ has two double bonds.
- Ethene is C₂H₄ with a C=C bond. In methanol, CH₃OH, oxygen bonds to carbon and hydrogen and retains two lone pairs.
Key vocabulary
| English | Chinese |
|---|---|
| double bond | 双键 |
| triple bond | 三键 |
| displayed formula | 结构式 |
Quick practice
How many bonding electrons are in one C=C double bond?
Need a hint?
Each shared pair contains two electrons.
Check your reasoning after trying
Four electrons.
Use the matching chapter worksheet. Attempt independently, compare your reasoning with your partner, then bring unresolved questions to your teacher.