Compare Elements

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

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Element comparison
Property La Lanthanum Ce Cerium
Atomic Number 57 lower 58 lower
Symbol La different Ce different
Name Lanthanum different Cerium different
Atomic Mass 138.9055 lower 140.116 lower
Category Lanthanides same value Lanthanides same value
Period 6 same value 6 same value
Group 3 same value 3 same value
Block f-Block same value f-Block same value
Standard State Solid same value Solid same value
Electronegativity 1.1 lower 1.12 lower
Atomic Radius 240 higher 235 higher
Ionization Energy 5.577 higher 5.539 higher
Electron Affinity 0.5 same value 0.5 same value
Oxidation States +3 different +4, +3 different
Melting Point 1191 K (917.85 °C) higher 1071 K (797.85 °C) higher
Boiling Point 3737 K (3463.85 °C) higher 3697 K (3423.85 °C) higher
Density 6.15 lower 6.77 lower
Electron Configuration [Xe]6s2 5d1 different [Xe]6s2 4f1 5d1 different
Year Discovered 1839 different 1803 different

higher lower