Chemical Elements.com - Holmium (Ho)

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Basic Information

Name: Holmium
Symbol: Ho
Atomic Number: 67
Atomic Mass: 164.93031 amu
Melting Point: 1470.0 °C (1743.15 K, 2678.0 °F)
Boiling Point: 2720.0 °C (2993.15 K, 4928.0 °F)
Number of Protons/Electrons: 67
Number of Neutrons: 98
Classification: Rare Earth
Crystal Structure: Hexagonal
Density @ 293 K: 8.54 g/cm³
Color: Silver

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
Ho-163	4570.0 years
Ho-165	Stable
Ho-166	1.1 days
Ho-166m	1200.0 years

Facts

Date of Discovery: 1878
Discoverer: J.L. Soret
Name Origin: Form the Latin word Holmia (Stockholm)
Uses: nuclear reactors
Obtained From: gadolinite

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