Strontium vs Yttrium

Side-by-side comparison of Strontium (Sr, element 38) and Yttrium (Y, element 39) by atomic structure and physical properties.

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PropertySr Strontium Y Yttrium
Atomic number3839
SymbolSrY
NameStrontiumYttrium
Categoryalkaline-earth-metaltransition-metal
Standard Atomic Weight87.62 u88.90584 u
Period55
Group23
Blocksd
Phase at STPSolidSolid
Electron configuration[Kr]5s2[Kr]4d15s2
Oxidation states[1, 2][0, 1, 2, 3]
Electronegativity (Pauling)0.951.22
Electron affinity0.052 eV0.307 eV
Density2640 kg/m³4470 kg/m³
Melting point776.85 °C1521.85 °C
Boiling point1381.85 °C3344.85 °C
Discovery year17921794

Key Differences

PropertySr StrontiumY Yttrium
Standard Atomic Weight87.62 u ↓ lower88.90584 u ↑ higher
Density2640 kg/m³ ↓ lower4470 kg/m³ ↑ higher
Melting point776.85 °C ↓ lower1521.85 °C ↑ higher
Boiling point1381.85 °C ↓ lower3344.85 °C ↑ higher
Electronegativity (Pauling)0.95 ↓ lower1.22 ↑ higher
Electron affinity0.052 eV ↓ lower0.307 eV ↑ higher
Group2 3
Blocks d
Categoryalkaline-earth-metal transition-metal
Electron configuration[Kr]5s2 [Kr]4d15s2
Discovery year1792 1794