What is the atomic weight of yttrium?

Answer 1

Check this link to learn about yttrium http://en.wikipedia.org/wiki/Yttrium

Answer 2

General
Name, Symbol, Number yttrium, Y, 39
Chemical series transition metals
Group, Period, Block 3, 5, d
Appearance silvery white

Atomic mass 88.90585(2) g/mol
Electron configuration [Kr] 4d1 5s2
Electrons per shell 2, 8, 18, 9, 2
Physical properties
Phase solid
Density (near r.t.) 4.472 g·cm−3
Liquid density at m.p. 4.24 g·cm−3
Melting point 1799 K
(1526 °C, 2779 °F)
Boiling point 3609 K
(3336 °C, 6037 °F)
Heat of fusion 11.42 kJ·mol−1
Heat of vaporization 365 kJ·mol−1
Heat capacity (25 °C) 26.53 J·mol−1·K−1
Vapor pressure P/Pa 1 10 100 1 k 10 k 100 k
at T/K 1883 2075 (2320) (2627) (3036) (3607)

Atomic properties
Crystal structure hexagonal
Oxidation states 3
(weakly basic oxide)
Electronegativity 1.22 (Pauling scale)
Ionization energies
(more) 1st: 600 kJ·mol−1
2nd: 1180 kJ·mol−1
3rd: 1980 kJ·mol−1
Atomic radius 180 pm
Atomic radius (calc.) 212 pm
Covalent radius 162 pm
Miscellaneous
Magnetic ordering no data
Electrical resistivity (r.t.) (α, poly) 596 nΩ·m
Thermal conductivity (300 K) 17.2 W·m−1·K−1
Thermal expansion (r.t.) (α, poly)
10.6 µm/(m·K)
Speed of sound (thin rod) (20 °C) 3300 m/s
Young's modulus 63.5 GPa
Shear modulus 25.6 GPa
Bulk modulus 41.2 GPa
Poisson ratio 0.243
Brinell hardness 589 MPa
CAS registry number 7440-65-5


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