Compare Elements

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

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Element comparison
Property Xe Xenon He Helium
Atomic Number 54 higher 2 higher
Symbol Xe different He different
Name Xenon different Helium different
Atomic Mass 131.29 higher 4.0026 higher
Category Noble Gases same value Noble Gases same value
Period 5 higher 1 higher
Group 18 same value 18 same value
Block p-Block same value p-Block same value
Standard State Gas same value Gas same value
Electronegativity 2.6 no data — no data
Atomic Radius 216 higher 140 higher
Ionization Energy 12.13 lower 24.587 lower
Electron Affinity — no data — no data
Oxidation States 0 same value 0 same value
Melting Point 161.36 K (-111.79 °C) higher 0.95 K (-272.2 °C) higher
Boiling Point 165.03 K (-108.12 °C) higher 4.22 K (-268.93 °C) higher
Density 0.0059 higher 0.0002 higher
Electron Configuration [Kr]5s2 4d10 5p6 different 1s2 different
Year Discovered 1898 different 1868 different

higher lower