Technetium

Statistics:

• Name: Technetium
• Symbol: Tc
• Classification: Transition Metal
• Atomic Number: 43
• Atomic Mass: 98.9063 g/mol
• Density: 11.49 g/cm³
• Melting: 2172°C
• Boiling: 5030°C
• Protons & Electrons:43
• Neutrons:55
• Discovered: 1937
• Discovered By: Perrier and Segrè
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 18
• Level 4: 13
• Level 5: 1

Isotopes:

Isotope: Half-life

• ⁹⁵Tc: 20.0 hours
• ^95m1Tc: 61 days
• ⁹⁶Tc: 4.28 days
• ^96m1Tc: 51.5 minutes
• ⁹⁷Tc: 2.6e6 years
• ^97m1Tc: 90.1 days
• ⁹⁸Tc: 4.2e+6 years
• ⁹⁹Tc: 2.111e+5 years
• ^99m1Tc: 6.01 hours
• ¹⁰⁰Tc: 15.8 seconds

Brief Summary

Technetium is a Transition Metal with the symbol 'Tc' and contains 43 Protons & Electrons with 55 neutrons in the nucleus of the atom. Technetium has an atomic mass of 98.9063 g/mol and, at a temperature of 20°C, has a density of 11.49 g/cm³. It will melt at a temperature of 2172°C and boil at 5030°C.

Technetium was discovered by Perrier and Segrè in 1937 and is named 'Technetium' Greek word "technêtos" meaning "artificial".

Some common usages for Technetium: The isotope Tc-99m is used for radioactive tracing in medicine.

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

Technetium :: Tc :: 43 - Chemical Element. 22 Nov. 2008 <http://www.chemicalelement.com/element/technetium.html>.