Compare Elements

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

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Element comparison
Property Ba Barium Ca Calcium
Atomic Number 56 higher 20 higher
Symbol Ba different Ca different
Name Barium different Calcium different
Atomic Mass 137.33 higher 40.08 higher
Category Alkaline Earth Metals same value Alkaline Earth Metals same value
Period 6 higher 4 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 0.89 lower 1 lower
Atomic Radius 268 higher 231 higher
Ionization Energy 5.212 lower 6.113 lower
Electron Affinity — no data — no data
Oxidation States +2 same value +2 same value
Melting Point 1000 K (726.85 °C) lower 1115 K (841.85 °C) lower
Boiling Point 2170 K (1896.85 °C) higher 1757 K (1483.85 °C) higher
Density 3.62 higher 1.54 higher
Electron Configuration [Xe]6s2 different [Ar]4s2 different
Year Discovered 1808 different Ancient different

higher lower