Facts about the
Definition of the Element Neptunium
The Element Neptunium is defined as... A radioactive metallic element
that is chemically similar to uranium and is obtained in nuclear
reactors as a by-product in the production of plutonium
Interesting Facts
about the Origin and Meaning of the element name Neptunium
What are the origins of the word Neptunium ?
Neptunium was named after the planet Neptune
Facts about the
Classification of the Element Neptunium
Neptunium classified as an element in the Actinide series as one
of the "Rare Earth Elements" which can located in Group 3 elements
of the Periodic Table and in the 6th and 7th periods. The Rare
Earth Elements are of the Lanthanide and Actinide series. Most of
the elements in the Actinide series are synthetic or man-made.
Brief Facts about the
Discovery and History of the Element Neptunium
Neptunium was discovered by Edwin McMillan and Philip Abelson in
the USA in 1940
Occurrence of the
element Neptunium in
the Atmosphere
Man-made
Common Uses of
Neptunium Neutron detection equipment
The Properties of the Element Neptunium
Name of Element : Neptunium
Symbol: Np
Atomic Number: 93
Atomic Mass: (237.0) amu
Melting Point: 640.0 °C - 913.15 °K
Boiling Point: 3902.0 °C - 4175.15 °K
Number of Protons/Electrons: 93
Number of Neutrons: 144
Crystal Structure: Orthorhombic
Density @ 293 K: 20.45 g/cm3
Color: Silvery
The element Neptunium and the Periodic Table
Find out more facts about Neptunium on the Periodic Table which
arranges every chemical element according to its atomic number, as
based on the periodic law, so that chemical elements with similar
properties are in the same column. Our Periodic Table is simple to
use - just click on the symbol for Neptunium for additional facts and
info and for an instant comparison of the Atomic Weight, Melting
Point, Boiling Point and Mass - G/cc of Neptunium with any other
element. An invaluable source for more interesting facts and
information about the Neptunium element and as a Chemistry reference
guide.
Facts and Info about
the element Argon - IUPAC and the Modern Standardised Periodic Table
The Standardised Periodic Table in use today was agreed by the
International Union of Pure Applied Chemistry, IUPAC, in 1985
which includes the Neptunium element. The famous Russian Scientist,
Dimitri Mendeleev, perceived the correct classification method of
"the periodic table" for the 65 elements which were known in his
time. Neptunium was discovered by Edwin McMillan and Philip
Abelson in the USA in 1940. The Standardised Periodic Table now recognises more periods
and elements than Dimitri Mendeleev knew in his day but still all
fitting into his concept of the "Periodic Table" in which
Neptunium is
just one element that can be found.
