Compare Elements

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

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Element comparison
Property Zr Zirconium Sr Strontium
Atomic Number 40 higher 38 higher
Symbol Zr different Sr different
Name Zirconium different Strontium different
Atomic Mass 91.22 higher 87.62 higher
Category Transition Metals different Alkaline Earth Metals different
Period 5 same value 5 same value
Group 4 higher 2 higher
Block d-Block different s-Block different
Standard State Solid same value Solid same value
Electronegativity 1.33 higher 0.95 higher
Atomic Radius 186 lower 249 lower
Ionization Energy 6.634 higher 5.695 higher
Electron Affinity 0.426 no data — no data
Oxidation States +4 different +2 different
Melting Point 2128 K (1854.85 °C) higher 1050 K (776.85 °C) higher
Boiling Point 4682 K (4408.85 °C) higher 1655 K (1381.85 °C) higher
Density 6.52 higher 2.64 higher
Electron Configuration [Kr]5s2 4d2 different [Kr]5s2 different
Year Discovered 1789 different 1790 different

higher lower