Information valid for Ho-165 unless otherwise noted

Holmium

Basic Information

Symbol: Ho
Atomic Number: 67
Mass: 164.93
Melting Point: 1470
Boiling Point: 2720
Number of Protons/Electrons: 67
Number of Neutrons: 98
Classification: Rare Earth
Crystal Structure: Hexagonal
Density: 8.54
Color: Silver

Atomic Structure

Number of Energy Levels: 6 First Energy Level: 2 Second Energy Level: 8 Third Energy Level: 18 Fourth Energy Level: 29 Fifth Energy Level: 8 Sixth Energy Level: 2

Isotopes

Facts

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