Gruppe 4
For hovedgruppe 4a, se Gruppe 14.
Gruppe 4 er en gruppe grundstoffer i det periodiske system. Tidligere hed de undergruppe IVb.
Gruppen tilhører overgangsmetallerne
- Titan (atomnummer 22)
- Zirconium (atomnummer 40)
- Hafnium (atomnummer 72)
- Rutherfordium (atomnummer 104)
Billedgalleri
Titan
Zirconium
Hafnium
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Hf-crystal bar.jpg
Forfatter/Opretter: Alchemist-hp (talk) (www.pse-mendelejew.de), Licens: CC BY-SA 3.0 de
A sample of a 1,7kg Hafnium crystal bar, made by van Arkel-de Boer process. The real background is removed. The shadow is added via Photoshop.
Forfatter/Opretter: Alchemist-hp (talk) (www.pse-mendelejew.de), Licens: CC BY-SA 3.0 de
A sample of a 1,7kg Hafnium crystal bar, made by van Arkel-de Boer process. The real background is removed. The shadow is added via Photoshop.
Titan-crystal bar.JPG
Forfatter/Opretter: Alchemist-hp (pse-mendelejew.de), Licens: CC BY-SA 3.0
A titanium crystal bar, high purity 99,995 %, made by the iodide process at URALREDMET in the Soviet era. Weight ≈283 g, ≈5.5 " long, ≈1 " diameter
Forfatter/Opretter: Alchemist-hp (pse-mendelejew.de), Licens: CC BY-SA 3.0
A titanium crystal bar, high purity 99,995 %, made by the iodide process at URALREDMET in the Soviet era. Weight ≈283 g, ≈5.5 " long, ≈1 " diameter
Zr-crystal-bar.jpg
Forfatter/Opretter: Alchemist-hp (talk) (www.pse-mendelejew.de), Licens: CC BY-SA 3.0 de
purest Zirconium 99.97%, crystal bar, made by crystal bar process
Forfatter/Opretter: Alchemist-hp (talk) (www.pse-mendelejew.de), Licens: CC BY-SA 3.0 de
purest Zirconium 99.97%, crystal bar, made by crystal bar process