Group 7 element

A Group 7 element is one in the series of elements in group 7 (IUPAC style) in the periodic table, which consists of the transition metals manganese (Mn), technetium (Tc), rhenium (Re), and bohrium (Bh).

All of these elements are classed in Group 7 because their valence shells hold seven electrons. Technetium has no stable isotopes. Technetium and promethium are the only two such elements before polonium, after which no known element has a stable isotope.

عناصر المجموعة السابعة Elementos del grupu 7 Grup 7 de la taula periòdica 7. skupina Mangangruppe Elementos del grupo 7 Elemento de grupo 7 7족 원소 Elementi del gruppo 7 Grupp 7 de la taula periòdica Mangaangroep 第7族元素 Gruppe 7 Manganowce 7. skupina 7. група хемијских елемената 7. grupa hemijskih elemenata ธาตุหมู่ 7 Nhóm nguyên tố 7