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Information valid for Mo-96 unless otherwise noted

Basic Information

Symbol: Mo
Atomic Number: 42
Mass: 95.94
Melting Point: 2617.0 C
Boiling Point: 4612.0 C
Number of Protons/Electrons: 42
Number of Neutrons: 54
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 293 K: 10.22 g/cm3
Color: silverish

Atomic Structure

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

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 13
    Fifth Energy Level: 1


Isotope Half Life
Mo-91 15.5 minutes
Mo-92 Stable
Mo-93 3500.0 years
Mo-94 Stable
Mo-95 Stable
Mo-96 Stable
Mo-97 Stable
Mo-98 Stable
Mo-99 2.74 days
Mo-100 Stable
Mo-101 14.6 minutes


Date of Discovery: 1778
Discoverer: Carl Wilhelm Scheele
Name Origin: From the Greek word molubdos (lead)
Uses: aircraft, missiles
Obtained From: molybdenite, wulfenite