Compare Elements

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

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Element comparison
Property Nd Neodymium Th Thorium
Atomic Number 60 lower 90 lower
Symbol Nd different Th different
Name Neodymium different Thorium different
Atomic Mass 144.24 lower 232.038 lower
Category Lanthanides different Actinides different
Period 6 lower 7 lower
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 1.14 lower 1.3 lower
Atomic Radius 229 lower 237 lower
Ionization Energy 5.525 lower 6.08 lower
Electron Affinity — no data — no data
Oxidation States +3 different +4 different
Melting Point 1294 K (1020.85 °C) lower 2023 K (1749.85 °C) lower
Boiling Point 3347 K (3073.85 °C) lower 5061 K (4787.85 °C) lower
Density 7.01 lower 11.72 lower
Electron Configuration [Xe]6s2 4f4 different [Rn]7s2 6d2 different
Year Discovered 1885 different 1828 different

higher lower