Titanium group
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Position in the periodic table
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| group | 4th |
| period | |
| 4th |
22 Ti |
| 5 |
40 Zr |
| 6th |
72 Hf |
| 7th |
104 para |
The 4th group of the periodic table contains the elements titanium , zirconium , hafnium and the element 104 rutherfordium , which was first produced in 1964 . The group is also known as the titanium group .
The elements of the group are all shiny silvery metals with high melting temperatures and a typical lattice structure. At sufficiently high temperatures, these metals react directly with most non-metals. Nevertheless, they are corrosion-resistant in their compact form, as a stable oxide layer forms in the air. This oxide layer also leads to resistance to many acids and alkaline reagents in all metals.
The elements used to be considered rare, presumably because of difficulties in extracting the pure metals. In fact, titanium and zirconium are among the five most common transition metals. Hafnium is not a rare metal either.
| Surname | titanium | Zirconium | hafnium | Rutherfordium |
|---|---|---|---|---|
| Melting point | 1941 K (1668 ° C) | 2130 K (1857 ° C) | 2506 K (2233 ° C) | ? |
| boiling point | 3560 K (3287 ° C) | 4682 K (4409 ° C) | 4876 K (4603 ° C) | ? |
| density | 4.507 g cm −3 | 6.511 g cm −3 | 13.31 g cm −3 | ? |
| Appearance | silvery metallic | silvery white | steel gray | ? |
| Atomic radius | 140 pm | 155 pm | 155 pm | ? |
- The metals
Titan Crystal Bar, 99.995%
Zirconium Crystal Bar, 99.97%
Hafnium Crystal Bar,> 99.9%
