Chemical Elements.com - Americium (Am)

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Basic Information

Name: Americium
Symbol: Am
Atomic Number: 95
Atomic Mass: (243.0) amu
Melting Point: 994.0 °C (1267.15 K, 1821.2 °F)
Boiling Point: 2607.0 °C (2880.15 K, 4724.6 °F)
Number of Protons/Electrons: 95
Number of Neutrons: 148
Classification: Rare Earth
Crystal Structure: Hexagonal
Density @ 293 K: 13.6 g/cm³
Color: Unknown

Atomic Structure

Number of Energy Levels: 7

First Energy Level:

Second Energy Level:

Third Energy Level:

Fourth Energy Level:

Fifth Energy Level:

Sixth Energy Level:

Seventh Energy Level:

Isotopes

Isotope	Half Life
Am-240	2.1 days
Am-241	432.7 years
Am-242	16.0 hours
Am-242m	141.0 years
Am-243	7370.0 years
Am-244	10.1 hours
Am-245	2.1 hours
Am-246	39.0 minutes

Facts

Date of Discovery: 1945
Discoverer: G.T. Seaborg
Name Origin: After America
Uses: Smoke Detectors
Obtained From: Man-made

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