What element is 93 atomic number?

Neptunium
Neptunium (Np), radioactive chemical element of the actinoid series of the periodic table that was the first transuranium element to be artificially produced, atomic number 93.

Why is neptunium named after Neptune?

McMillan and Abelson decided to call the element neptunium because Neptune is the next planet beyond Uranus in the solar system. The discovery was the first transuranium element to be synthesized in a lab and earned McMillan a Nobel Prize in 1951.

What is the characteristic of neptunium?

Neptunium is a ductile, silvery, radioactive metal. Neptunium forms numerous chemical compounds. Chemically it is extremely reactive and is attacked by oxygen, steam and acids, but not by alkalis.

What is the origin of the element neptunium?

Neptunium was first made in 1940 by Edwin McMillan and Philip Abelson at Berkeley, California. It came from a uranium target that had been bombarded with slow neutrons and which then emitted unusual beta-rays indicating a new isotope.

Is plutonium man-made?

Plutonium is considered a man-made element, although scientists have found trace amounts of naturally occurring plutonium produced under highly unusual geologic circumstances. The most common radioisotopes. For example, uranium has thirty-seven different isotopes, including uranium-235 and uranium-238.

Is plutonium man made?

What is the first transuranium element * 1 point?

Since only two of the transuranium elements have been found in nature (neptunium and plutonium) and those only in trace amounts, the synthesis of these elements through nuclear reactions has been an important source of knowledge about them.

Is neptunium used in bombs?

Like its more famous neighbours in the periodic table, uranium and plutonium, neptunium can form the basis of an atomic bomb.

What is the symbol of neptunium?

Np
Neptunium/Symbol

Is neptunium man-made?

When neptunium was first discovered, scientists thought it was an entirely artificial, or man-made, element. In 1942, very small amounts of the element were found in the Earth’s crust. The element can sometimes be found in ores containing uranium and other radioactive elements.

How does neptunium react to other elements?

Due to its reactionary nature, neptunium is known to oxidize quickly and produce compounds with several other elements, including unusual metal-metal compounds with aluminum and beryllium. It is primarily reactive with oxygen, steam or acid but does not react to alkalis .

Will neptunium combine with other elements?

When isolated, neptunium is silvery in color, and very reactive, combining with other elements to form an assortment of compounds, like other elements in the actinide series. It is also naturally radioactive, as are its isotopes.

What family does the element neptunium belong to?

Neptunium. A radioactive element of the actinide metals family. It has the atomic symbol Np, atomic number 93, and atomic weight 237. How to pronounce NEPTUNIUM?

How is neptunium similar to plutonium?

Neptunium reacts with hydrogen in a similar manner to its neighbor plutonium, forming the hydrides NpH 2+x (face-centered cubic) and NpH 3 . These are isostructural with the corresponding plutonium hydrides, although unlike PuH 2+ x , the lattice parameters of NpH 2+ x become greater as the hydrogen content ( x ) increases.