Compare Elements

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

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

higher lower