Group 4 element
From Wikipedia, the free encyclopedia
| Group | 4 |
| Period | |
| 4 | 22 Ti |
| 5 | 40 Zr |
| 6 | 72 Hf |
| 7 | 104 Rf |
A Group 4 element is one in the series of elements in group 4 (IUPAC style) in the periodic table, which consists of titanium (Ti), zirconium (Zr), hafnium (Hf) and rutherfordium (Rf).
All of these elements are classed in Group 4 because their valence shell holds four electrons. Rutherfordium can only be produced in the laboratory and has not been found in nature.
| Explanation of right-hand periodic table slice: | Transition metals | atomic number in black are solids |
| solid borders are older than the Earth (Primordial elements) | dotted borders are made artificially (Synthetic elements) |
