Compare Elements

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

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Element comparison
Property In Indium Sr Strontium
Atomic Number 49 higher 38 higher
Symbol In different Sr different
Name Indium different Strontium different
Atomic Mass 114.818 higher 87.62 higher
Category Post-transition Metals different Alkaline Earth Metals different
Period 5 same value 5 same value
Group 13 higher 2 higher
Block p-Block different s-Block different
Standard State Solid same value Solid same value
Electronegativity 1.78 higher 0.95 higher
Atomic Radius 193 lower 249 lower
Ionization Energy 5.786 higher 5.695 higher
Electron Affinity 0.3 no data — no data
Oxidation States +3 different +2 different
Melting Point 429.75 K (156.6 °C) lower 1050 K (776.85 °C) lower
Boiling Point 2345 K (2071.85 °C) higher 1655 K (1381.85 °C) higher
Density 7.31 higher 2.64 higher
Electron Configuration [Kr]5s2 4d10 5p1 different [Kr]5s2 different
Year Discovered 1863 different 1790 different

higher lower