Compare Elements

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

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Element comparison
Property Ar Argon Xe Xenon
Atomic Number 18 lower 54 lower
Symbol Ar different Xe different
Name Argon different Xenon different
Atomic Mass 39.9 lower 131.29 lower
Category Noble Gases same value Noble Gases same value
Period 3 lower 5 lower
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 — no data 2.6 no data
Atomic Radius 188 lower 216 lower
Ionization Energy 15.76 higher 12.13 higher
Electron Affinity — no data — no data
Oxidation States 0 same value 0 same value
Melting Point 83.8 K (-189.35 °C) lower 161.36 K (-111.79 °C) lower
Boiling Point 87.3 K (-185.85 °C) lower 165.03 K (-108.12 °C) lower
Density 0.0018 lower 0.0059 lower
Electron Configuration [Ne]3s2 3p6 different [Kr]5s2 4d10 5p6 different
Year Discovered 1894 different 1898 different

higher lower