Sentence examples for neptunium from inspiring English sources

The fourth set, the neptunium series, is headed by neptunium-237, whash has a half-life of 2,000,000 years.

That makes those nuclei heavier still, converting them into neptunium, plutonium, americium and curium.All these by-products of nuclear fission are radioactive, and many will remain so for thousands—sometimes millions of years.

Technetium and neptunium had already been made at the University of California at Berkeley (taking the number of known elements to 93) by the time Dr Seaborg got his hands on the campus's particle accelerator, the cyclotron.

At the end of the neptunium series, for example, lead-209 undergoes negative beta decay to bismuth-209.

The +4 actinoids thorium, protactinium, uranium, neptunium, plutonium, berkelium, and, to a lesser extent, americium, curium, and californium are sufficiently stable to undergo chemical reactions in aqueous solutions.

Synthetic isotopes have been prepared; thorium-229 (7,880-year half-life), formed in the decay chain originating in the synthetic actinoid element neptunium, serves as a tracer for ordinary thorium (thorium-232).

Mr. Alvarez said the department should check soil and groundwater for three radiological isotopes, plutonium-239, neptunium-237 and technetium-99, which were far more hazardous than uranium, which has been a target in testing thus far.

Neptunium-239 in turn undergoes beta decay, being transformed into plutonium-239 (atomic number 94).

Neptunium-237 can be separated from used reactor fuel to study the physical and chemical properties of the element.

A nucleus of neptunium-239 may undergo beta decay, in which one of its neutrons emits an electron leaving a proton.

Neptunium VII) and plutonium VII) have been prepared in basic solution, and certain oxygenated ions (of the type represented by MO53−) as well as a few solid compounds have been identified with the same oxidation state.