What is 237 on the periodic table?
What is 237 on the periodic table?
Neptunium
| Atomic Number: | 93 | Atomic Radius: |
|---|---|---|
| Atomic Symbol: | Np | Melting Point: |
| Atomic Weight: | 237 | Boiling Point: |
| Electron Configuration: | [Rn]7s25f46d1 | Oxidation States: |
What is neptunium-237 used for?
However, neptunium-237 is used to create plutonium-238, which is then used in special energy generators that can power satellites, spacecraft and lighthouses for a long period of time. Neptunium-237 is also used in nuclear physics research as a part of a device that detects high-energy neutrons.
What element has an atomic mass of 237?
neptunium
| atomic number | 93 |
|---|---|
| stablest isotope | 237 |
| melting point | 640 °C (1,184 °F) |
| specific gravity (alpha) | 20.45 |
| oxidation states | +3, +4, +5, +6, +7 |
Is neptunium-237 radioactive?
… are radioactive; the stablest is neptunium-237, with a half-life of 2,144,000 years, and among the most unstable is neptunium-225, with a half-life of more than 2 microseconds. Neptunium-237 can be separated from used reactor fuel to study the physical and chemical properties of the element.
What is the element produced by the decay of Np 237 by alpha emission?
Neptunium-
The primary decay mode for Np-237 is by alpha-decay forming protactinium. The primary decay mode for the isotopes heavier than Np-237 is by beta-decay, forming plutonium. Neptunium-237, after decaying to protactinium then to uranium, eventually decays to form bismuth-209 and thallium-205.
What is PA in the periodic table?
protactinium (Pa), radioactive chemical element of the actinoid series of the periodic table, rarer than radium; its atomic number is 91. It occurs in all uranium ores to the extent of 0.34 part per million of uranium.
How is NP 237 produced?
Neptunium 237 is routinely produced in nuclear reactors as a result of the neutron irradiation of uranium 235 and uranium 238, the two most common constituents of nuclear fuel. It is also a decay product of americium 241. Large quantities of neptunium 237 are found in spent nuclear fuel.
How is neptunium 237 produced?
Trace amounts of the neptunium isotopes neptunium-237 and -239 are found naturally as decay products from transmutation reactions in uranium ores. In particular, 239Np and 237Np are the most common of these isotopes; they are directly formed from neutron capture by uranium-238 atoms.
How much does neptunium 237 cost?
The O.R.N.L. has 237Np available for sale to its licensees and for export. This isotope can be used as a component in neutron detection instruments. It is offered at a price of $660/g plus packing costs. Common Isotopes: Isotopes of neptunium with mass numbers from 228 to 242 are known.
Who discovered element 91?
Protactinium metal was first prepared (1934) by American chemist Aristid V. Grosse. The first isotope, protactinium-234, was discovered (1913) by American chemists Kasimir Fajans and O.H. Göhring….protactinium.
| atomic number | 91 |
|---|---|
| electron configuration of gaseous atomic state | [Rn]5f26d17s2 |
What color is Protactinium?
Protactinium is a silver metallic element that belongs to the actinide group. It is malleable, shiny, silver-gray, radioactive. It does not tarnish rapidly in air, it is attacked by oxygen, steam and acids, but not by alkalis. It is superconductive at temperatures below 1.4 K.
