Compare Elements

Compare two chemical elements side by side across 19 atomic and physical properties.

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Element comparison
Property Fe Iron Os Osmium
Atomic Number 26 lower 76 lower
Symbol Fe different Os different
Name Iron different Osmium different
Atomic Mass 55.84 lower 190.2 lower
Category Transition Metals same value Transition Metals same value
Period 4 lower 6 lower
Group 8 same value 8 same value
Block d-Block same value d-Block same value
Standard State Solid same value Solid same value
Electronegativity 1.83 lower 2.2 lower
Atomic Radius 194 lower 216 lower
Ionization Energy 7.902 lower 8.7 lower
Electron Affinity 0.163 lower 1.1 lower
Oxidation States +3, +2 different +4, +3 different
Melting Point 1811 K (1537.85 °C) lower 3306 K (3032.85 °C) lower
Boiling Point 3134 K (2860.85 °C) lower 5285 K (5011.85 °C) lower
Density 7.874 lower 22.57 lower
Electron Configuration [Ar]4s2 3d6 different [Xe]6s2 4f14 5d6 different
Year Discovered Ancient different 1803 different

higher lower