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Yttrium


5
39
88.90585
KEY
Chemical Element Symbol Key

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Yttrium
Columbia Encyclopedia
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Symbol: Y
Atomic Number: 39
Atomic Weight: 88.90585
Element Classification: Transition Metal
Discovered By: Johann Gadolin
Discovery Date: 1789 (Finland)
Name Origin: The Swedish village, Ytterby, where one of its minerals was first found.
Density (g/cc): 4.47
Melting Point (K): 1795
Boiling Point (K): 3611
Appearance: Silvery, ductile, fairly reactive metal
Atomic Radius (pm): 178
Atomic Volume (cc/mol): 19.8
Covalent Radius (pm): 162
Ionic Radius: 89.3 (+3e)
Specific Heat (@20°C J/g mol): 0.284
Fusion Heat (kJ/mol): 11.5
Evaporation Heat (kJ/mol): 367
Thermal Conductivity (@25°C W/m K):
Debye Temperature (K): n/a
Pauling Negativity Number: 1.22
First Ionizing Energy (kJ/mol): 615.4
Oxidation States: 3
Electronic Configuration: [Kr] 4d1 5s2
Lattice Structure: Hexagonal (HEX
Lattice Constant (Å): 3.650
Lattice C/A Ratio: 1.571


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