Compare Elements

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

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Element comparison
Property Sr Strontium Be Beryllium
Atomic Number 38 higher 4 higher
Symbol Sr different Be different
Name Strontium different Beryllium different
Atomic Mass 87.62 higher 9.0122 higher
Category Alkaline Earth Metals same value Alkaline Earth Metals same value
Period 5 higher 2 higher
Group 2 same value 2 same value
Block s-Block same value s-Block same value
Standard State Solid same value Solid same value
Electronegativity 0.95 lower 1.57 lower
Atomic Radius 249 higher 153 higher
Ionization Energy 5.695 lower 9.323 lower
Electron Affinity — no data — no data
Oxidation States +2 same value +2 same value
Melting Point 1050 K (776.85 °C) lower 1560 K (1286.85 °C) lower
Boiling Point 1655 K (1381.85 °C) lower 2744 K (2470.85 °C) lower
Density 2.64 higher 1.85 higher
Electron Configuration [Kr]5s2 different [He]2s2 different
Year Discovered 1790 different 1798 different

higher lower