Chemical Elements.com - Ruthenium (Ru)

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Basic Information

Name: Ruthenium
Symbol: Ru
Atomic Number: 44
Atomic Mass: 101.07 amu
Melting Point: 2250.0 °C (2523.15 K, 4082.0 °F)
Boiling Point: 3900.0 °C (4173.15 K, 7052.0 °F)
Number of Protons/Electrons: 44
Number of Neutrons: 57
Classification: Transition Metal
Crystal Structure: Hexagonal
Density @ 293 K: 12.2 g/cm³
Color: silvery

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
Ru-96	Stable
Ru-97	2.89 days
Ru-98	Stable
Ru-99	Stable
Ru-100	Stable
Ru-101	Stable
Ru-102	Stable
Ru-103	39.27 days
Ru-104	Stable
Ru-105	4.44 hours
Ru-106	1.02 years

Facts

Date of Discovery: 1844
Discoverer: Karl Klaus
Name Origin: From the Latin word Ruthenia (Russia)
Uses: platinum alloys
Obtained From: pentlandite, pyroxinite

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