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Information valid for Y-89 unless otherwise noted

Basic Information

Symbol: Y
Atomic Number: 39
Mass: 88.90585
Melting Point: 1523.0 C
Boiling Point: 3337.0 C
Number of Protons/Electrons: 39
Number of Neutrons: 50
Classification: Transition Metal
Crystal Structure: Hexagonal
Density @ 293 K: 4.469 g/cm3
Color: silvery

Atomic Structure

[Bohr Model of Yttrium]
Number of Energy Levels: 5

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 9
    Fifth Energy Level: 2


Isotope Half Life
Y-86 14.74 hours
Y-87 3.35 days
Y-88 106.6 days
Y-89 Stable
Y-90 2.67 days
Y-90m 3.19 hours
Y-91 58.51 days
Y-91m 49.71 minutes
Y-92 3.54 hours
Y-93 10.2 hours


Date of Discovery: 1794
Discoverer: Johann Gadolin
Name Origin: After Ytterby (a town in Sweden)
Uses: color TV's, radars
Obtained From: monazite, xenotime, yettriac