Chemical Elements.com - Molybdenum (Mo)

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Basic Information

Name: Molybdenum
Symbol: Mo
Atomic Number: 42
Atomic Mass: 95.94 amu
Melting Point: 2617.0 °C (2890.15 K, 4742.6 °F)
Boiling Point: 4612.0 °C (4885.15 K, 8333.6 °F)
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

Number of Energy Levels: 5

First Energy Level:

Second Energy Level:

Third Energy Level:

Fourth Energy Level:

Fifth Energy Level:

Isotopes

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

Facts

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

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