Knowra Group 8 element Group 8 element A transition-metal element in periodic-table group 8: iron, ruthenium, osmium, or hassium. These elements share a group position but differ greatly in abundance, stability, and chemistry.
Periodic table : A chart of chemical elements arranged by atomic number and recurring chemical properties. Group 8 is one vertical column in this arrangement.
Iron : A metallic chemical element with symbol Fe and atomic number 26. Iron is the abundant first-row member of group 8.
Hemoglobin : An oxygen-binding protein in red blood cells that contains iron-bearing heme groups. Iron's reversible oxygen binding makes it essential to hemoglobin's function.
Group 7 element : A chemical element in periodic-table group 7: manganese, technetium, rhenium, or bohrium. The adjacent column differs in valence-electron count and characteristic chemistry.
Group (periodic table) : A vertical column of elements in the periodic table, whose members often share valence-electron patterns. The group number defines which four elements belong here.
Ruthenium : A hard, silvery transition metal with symbol Ru and atomic number 44. Ruthenium shows how heavier group members develop distinct catalytic chemistry.
Iron and steel : Iron-based materials, including steel alloys strengthened or modified by other elements. Most practical use of group 8 centers on iron and its alloys.
Group 9 element : A chemical element in periodic-table group 9: cobalt, rhodium, iridium, or meitnerium. The next column provides a close comparison for group 8's periodic trends.
Transition metal : An element whose atom or common ion has an incomplete d subshell. All four group members are classified as transition metals.
Osmium : A dense, brittle transition metal with symbol Os and atomic number 76. Osmium is a stable heavy member with unusually high density.
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