Compare Elements

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

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Element comparison
Property Fr Francium Hs Hassium
Atomic Number 87 lower 108 lower
Symbol Fr different Hs different
Name Francium different Hassium different
Atomic Mass 223.0197 lower 269.1336 lower
Category Alkali Metals different Transition Metals different
Period 7 same value 7 same value
Group 1 lower 8 lower
Block s-Block different d-Block different
Standard State Solid same value Solid same value
Electronegativity 0.7 no data — no data
Atomic Radius 348 no data — no data
Ionization Energy 3.9 no data — no data
Electron Affinity 0.47 no data — no data
Oxidation States +1 different 8, 6, 5, 4, 3, 2 different
Melting Point 300 K (26.85 °C) no data — no data
Boiling Point — no data — no data
Density — no data — no data
Electron Configuration [Rn]7s1 different [Rn]7s2 5f14 6d6 different
Year Discovered 1939 different 1984 different

higher lower