Compare Elements

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

Swap
Element comparison
Property Kr Krypton Rn Radon
Atomic Number 36 lower 86 lower
Symbol Kr different Rn different
Name Krypton different Radon different
Atomic Mass 83.8 lower 222.0176 lower
Category Noble Gases same value Noble Gases same value
Period 4 lower 6 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 3 no data — no data
Atomic Radius 202 lower 220 lower
Ionization Energy 14 higher 10.745 higher
Electron Affinity — no data — no data
Oxidation States 0 same value 0 same value
Melting Point 115.79 K (-157.36 °C) lower 202 K (-71.15 °C) lower
Boiling Point 119.93 K (-153.22 °C) lower 211.45 K (-61.7 °C) lower
Density 0.0037 lower 0.0097 lower
Electron Configuration [Ar]4s2 3d10 4p6 different [Xe]6s2 4f14 5d10 6p6 different
Year Discovered 1898 different 1900 different

higher lower