Compare Elements

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

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Element comparison
Property Hf Hafnium Ba Barium
Atomic Number 72 higher 56 higher
Symbol Hf different Ba different
Name Hafnium different Barium different
Atomic Mass 178.49 higher 137.33 higher
Category Transition Metals different Alkaline Earth Metals different
Period 6 same value 6 same value
Group 4 higher 2 higher
Block d-Block different s-Block different
Standard State Solid same value Solid same value
Electronegativity 1.3 higher 0.89 higher
Atomic Radius 212 lower 268 lower
Ionization Energy 6.825 higher 5.212 higher
Electron Affinity — no data — no data
Oxidation States +4 different +2 different
Melting Point 2506 K (2232.85 °C) higher 1000 K (726.85 °C) higher
Boiling Point 4876 K (4602.85 °C) higher 2170 K (1896.85 °C) higher
Density 13.3 higher 3.62 higher
Electron Configuration [Xe]6s2 4f14 5d2 different [Xe]6s2 different
Year Discovered 1923 different 1808 different

higher lower