Technetium in a sentence

Only minute traces of technetium occur naturally in the Earth's crust—as a spontaneous fission product of uranium-238 or by neutron capture in molybdenum ores—but technetium is present naturally in red giant stars.

Technetium-99m emits only gamma rays and decays to technetium-99.

Technetium carbonyl (Tc 2 (CO) 10 ) is a white solid. citation In this molecule, two technetium atoms are weakly bound to each other; each atom is surrounded by octahedra of five carbonyl ligands.

The bond length between technetium atoms, 303 pm, citation citation is significantly larger than the distance between two atoms in metallic technetium (272 pm).

This complex has a coordination number of 9 (meaning that the technetium atom has nine neighbors), which is the highest for a technetium complex.

We are supremely confident in our technology and channels to market, and although aggressive, we still anticipate bringing the technetium-99 product line to market around the end of 2019.

After sitting for several years, the radioactivity reduces to a level where extraction of the long-lived isotopes, including technetium-99, becomes feasible.

A series of chemical processes yields technetium-99 metal of high purity.

Because technetium is radioactive, with a half-life much less than the age of the star, its abundance must reflect its recent creation within that star.

For example Technetium-99m is a radioactive tracer that medical imaging equipment tracks in the human body.

Her suggestion was not taken seriously at the time because her team had not carried out any experiments with uranium, and its claim to have discovered masurium ( technetium ) was disputed.

In diagnostic nuclear medicine a number of short-lived gamma emitters such as technetium-99m are used.

It consists of a trigonal prism with a technetium atom in the center and six hydrogen atoms at the corners.

Its short-lived gamma ray -emitting nuclear isomer — technetium-99m —is used in nuclear medicine for a wide variety of diagnostic tests.

Many of technetium's properties were predicted by Dmitri Mendeleev before the element was discovered.

Molybdenum-99 has a half-life of 67 hours, so short-lived technetium-99m (half-life: 6 hours), which results from its decay, is being constantly produced.

Natural technetium and promethium are produced in this manner.

One theory holds that the pertechnetate reacts with the steel surface to form a layer of technetium dioxide which prevents further corrosion; the same effect explains how iron powder can be used to remove pertechnetate from water.

Our calculation of the amount of element 43 required to produce their spectrum is quite similar to the direct measurements of natural technetium abundance in uranium ore published in 1999 by Dave Curtis and colleagues at Los Alamos.

Radionuclide testing using thallium or technetium can be used to demonstrate areas of perfusion abnormalities.