Sgwrs Nodyn:Gwybodlen Tabl elfen
Termau cemegol:
- Chemical series: Dilyniant cemegol
- Group: Grŵp
- Period: Cyfnod
- Appearance: Golwg
- Atomic mass: Màs atomig
- Electron configuration: Cyfluniad electronig
- Electrons per shell: Electronau ym mhob plisgyn electronau