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Group 4 is the second group of transition metals in the periodic table. It contains only the four elements titanium (Ti), zirconium (Zr), hafnium (Hf), and rutherfordium (Rf). The group is also called the titanium group or titanium family after its lightest member.
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hafnium zirconium titanium group rutherfordium metal element metals elements chemical oxide due properties chemistry state biological high low less first
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Group 4 element | IUPAC group number | IUPAC group number4 Name by elementtitanium group CAS group number (US, pattern A-B-A)IVB old IUPAC number (Europe, pattern A-B)IVA | 1.00 | infobox |
| Niels Bohr | instance of | several physicists and chemists | 0.80 | text |
| Charles Rugeley Bury suggested that element 72 should resemble zirconium | instance of | several physicists and chemists | 0.80 | text |
| therefore was not part of the rare earth elements group | instance of | several physicists and chemists | 0.80 | text |
| nitric acids indeed tend to reduce reactivity as they induce the formation of this oxide layer | instance of | Oxidizing acids | 0.80 | text |
| Group 4 element | related to Biological occurrences | The | 0.60 | section |
| Group 4 element | related to Biological occurrences | Titanium | 0.60 | section |
| Group 4 element | related to Biological occurrences | However | 0.60 | section |
| Group 4 element | related to Biological occurrences | Most | 0.60 | section |
| Group 4 element | related to Biological occurrences | Earth | 0.60 | section |
| Group 4 element | related to Occurrence | The | 0.60 | section |
| Group 4 element | related to Occurrence | Titanium | 0.60 | section |
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