Group	4
Period
4	22 Ti
5	40 Zr
6	72 Hf
7	104 Rf

A Group 4 element is 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)

Periodic table Chemical element groups

عناصر المجموعة الرابعة | Elementos del grupu 4 | Grup 4 de la taula periòdica | 4. skupina | Gruppe-4-Element | Elementos del grupo 4 | Elemento de grupo 4 | Elementi del gruppo 4 | 4-tos grupės elementai | Titaangroep | 第4族元素 | Gruppe 4 | 4. група хемијских елемената | 4. grupa hemijskih elemenata | ธาตุหมู่ 4