Gourt Home::Gourt :: Periodic table (standard)
| Group → | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | ||
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| * Lanthanides | ||||||||||||||||||||
| ** Actinides | ||||||||||||||||||||
Notes
- Actinides and lanthanides are collectively known as "rare earth elements", a deprecated term. Regarding group membership of these elements, see here.
- Alkali metals, alkaline earth metals, transition metals, actinides, lanthanides, and poor metals are all collectively known as "metals".
- Halogens and noble gases are also non-metals.
State at standard temperature and pressure (0°C and 1 atm)
Natural occurrence
- those with dashed borders arise naturally from decay of other elements, and have no isotopes with a half-life comparable to the age of the Earth; however, some are found in trace amounts in radioactive ores
- those with dotted borders are synthetic elements, which do not occur naturally
- Note: Although californium (Cf, 98) does not occur naturally on Earth, Cf and its decay products occur in the Universe; their electromagnetic emissions are regularly observed in supernova spectra
- those without borders have not been discovered or synthesised yet
See also
External links
Periodická tabulka | Det periodiske system | 주기율표 (표준) | Periodická tabuľka | Tabel periodik (baku) | Bảng tuần hoàn (tiêu chuẩn)
"Periodic table (standard)"