Lutetium

Statistics:

• Name: Lutetium
• Symbol: Lu
• Classification: Lanthanide
• Atomic Number: 71
• Atomic Mass: 174.967 g/mol
• Density: 9.84 g/cm³
• Melting: 1656°C
• Boiling: 3315°C
• Protons & Electrons:71
• Neutrons:104
• Discovered: 1907
• Discovered By: Urbain
• Sponsored By: Your Ad Here

Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 18
• Level 4: 32
• Level 5: 9
• Level 6: 2

Isotopes:

Isotope: Half-life

• ¹⁷²Lu: 6.70 days
• ^172m1Lu: 3.7 minutes
• ¹⁷³Lu: 1.37 years
• ¹⁷⁴Lu: 3.31 years
• ^174m1Lu: 142 days
• ¹⁷⁵Lu: stable
• ¹⁷⁶Lu: 3.78e10 years
• ¹⁷⁷Lu: 6.734 days
• ^177m1Lu: 160.4 days

Brief Summary

Lutetium is a Lanthanide with the symbol 'Lu' and contains 71 Protons & Electrons with 104 neutrons in the nucleus of the atom. Lutetium has an atomic mass of 174.967 g/mol and, at a temperature of 20°C, has a density of 9.84 g/cm³. It will melt at a temperature of 1656°C and boil at 3315°C.

Lutetium was discovered by Urbain in 1907 and is named 'Lutetium' Lutetia, an old name for Paris.

Some common usages for Lutetium: currently unknown.

Definitions and Notes

Density listed is at a temperature of 20°C.

Isotopes are forms of an element who have the same atomic number but different mass because they contain different number of neutrons.

Half-life is the time required for a quantity of a subject to fall to half of its current quantity.

MLA Citing Format

Lutetium :: Lu :: 71 - Chemical Element. 29 Jul. 2010 <http://www.chemicalelement.com/element/lutetium.html>.