Kata Kunci Pencarian:
- Tabel periodik
- Logam tanah jarang
- Kimia
- Bilangan oksidasi
- Metaloid
- Isotop
- Unsur periode 5
- Itrium
- Damhus Lake
- Preferred IUPAC name
- Vanløse
- Interpunct
- Periodic table
- IUPAC nomenclature of organic chemistry
- Amine
- Isotope
- Valby
- Transition metal