Roentgenium

Statistics:

• Name: Roentgenium
• Symbol: Rg
• Classification: Transition Metal
• Atomic Number: 111
• Atomic Mass: 272 g/mol
• Density: unknown
• Melting: unknown
• Boiling: unknown
• Protons & Electrons:111
• Neutrons:161
• Discovered: 1994
• Discovered By: GSI
• Sponsored By: Your Ad Here

Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 18
• Level 4: 32
• Level 5: 32
• Level 6: 17
• Level 7: 2

Isotopes:

Isotope: Half-life

• ²⁷²Rg: 1.5 milliseconds

Brief Summary

Roentgenium is a Transition Metal with the symbol 'Rg' and contains 111 Protons & Electrons with 161 neutrons in the nucleus of the atom. Roentgenium has an atomic mass of 272 g/mol .

Roentgenium was discovered by GSI in 1994 and is named 'Roentgenium' After Wilhelm Röntgen.

Some common usages for Roentgenium: 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

Roentgenium :: Rg :: 111 - Chemical Element. 22 Nov. 2008 <http://www.chemicalelement.com/element/roentgenium.html>.