TechnetiumThis is a featured page


My Nucleus

Protons: 43
Neutrons: 55

Isotope

 Half Life

Tc-95 20.0 hours
Tc-95m 61.0 days
Tc-96 4.28 days
Tc-96m 51.5 minutes
Tc-97 2600000 years
Tc-97m 90.0 days
Tc-98 4200000 years
Tc-99 2.13E5 years
Tc-99m 6.0 hours
Tc-100 14.2 minutes

Average Atomic Mass: [98]
My Electrons

Electrons: 43

Electronic Configuration

The following represents the electronic configuration and its associated term symbol for the ground state neutral gaseous atom. The configuration associated with technetium in its compounds is not necessarily the same.
The image below is a schematic representation of the shell structure of technetium - not what the atom of technetium "looks like". Kossel shell structure of Tc
My Properties

State (25 ° C): Solid
Melting Point: 2445 K
Boiling Point: 5150 K
Density [298K]: 11500 kg m-3
Color: silvery grey metallic
Atomic Radius:
  • Tc 2 +: 95 pm
  • Tc 4 +: 72 pm
  • Tc 7 +: 56 pm
  • Atomic: 135.8 pm
Atomic Number: 43
Atomic Mass: 98

My Home

Technetium has no biological role. Technetium does not occur naturally in the biosphere and so normally never presents a risk. All technetium compounds should be regarded as highly toxic, largely because of its radiological toxicity.

I am

TECHNETIUM

Technetium - Chemistry with Mr. Olson
My Compounds

Fluorides

  • TcF5: technetium (V) fluoride
  • TcF6: technetium (VI) fluoride

Chlorides

  • TcCl4: technetium (IV) chloride
  • TcCl6: technetium (VI) chloride

Bromides

  • TcBr4: technetium (IV) bromide

Iodides

  • none listed

Oxides

  • TcO2: technetium (IV) oxide
  • Tc2O7: technetium (VII) oxide

Sulfides

  • TcS2: technetium (IV) sulphide

  • Carbonyls



My Story
Element 43 (technetium) was predicted on the basis of the periodic table by Mendeleev. He suggested that it should be very similar to manganese and gave it the name ekamanganese. Technetium was erroneously reported as having been discovered in 1925, at which time it was named masurium. The element was actually discovered by C. Perrier and Emilio Gino Segre in Italy in 1937. It was found in a sample of molybdenum bombarded by deuterons. Technetium was the first element to be produced artificially and all its isotopes are radioactive. It is named after the Greek technetos, artificial.
My Jobs
  • ammonium pertechnate, NH4TcO4, is a specialist corrosion inhibitor for steel. Mild carbon steels are protected by 5 ppm of KTcO4 in aerated distilled water at temperatures up to 250°C. This corrosion protection is limited to closed systems, since technetium is radioactive
  • superconductor at 11 K and below
  • medical imaging agents
  • 95Tc is used for tracer work (radioactive tracers)


The Elements Song



Technetium is one of the elements in the periodic table.
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kingrock23iwgp 		Latest page update: made by kingrock23iwgp , Oct 19 2006, 12:40 PM EDT (about this update About This Update kingrock23iwgp Edited by kingrock23iwgp

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