Chemical Elements.com - Platinum (Pt)

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Basic Information

Name: Platinum
Symbol: Pt
Atomic Number: 78
Atomic Mass: 195.078 amu
Melting Point: 1772.0 °C (2045.15 K, 3221.6 °F)
Boiling Point: 3827.0 °C (4100.15 K, 6920.6 °F)
Number of Protons/Electrons: 78
Number of Neutrons: 117
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 293 K: 21.45 g/cm³
Color: silverish

Atomic Structure

Number of Energy Levels: 6

First Energy Level:

Second Energy Level:

Third Energy Level:

Fourth Energy Level:

Fifth Energy Level:

Sixth Energy Level:

Isotopes

Isotope	Half Life
Pt-188	10.2 days
Pt-190	6.0E11 years
Pt-191	2.96 days
Pt-192	Stable
Pt-193	60.0 years
Pt-193m	4.33 days
Pt-194	Stable
Pt-195	Stable
Pt-195m	4.02 days
Pt-196	Stable
Pt-197	18.3 hours
Pt-197m	1.59 hours
Pt-198	Stable

Facts

Date of Discovery: 1735
Discoverer: Julius Scaliger
Name Origin: From the Spanish word platina (little silver)
Uses: jewelry, containers, catalyst
Obtained From: platinum ores

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