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Like the periodic table, the list below organizes the elements by the number of protons in their atoms; it can also be organized by other properties, such as atomic weight, density, and electronegativity. For more detailed information about the origins of element names, see List of chemical element name etymologies.
Periodic table of the chemical elements showing the most or more commonly named sets of elements (in periodic tables), and a traditional dividing line between metals and nonmetals. The f-block actually fits between groups 2 and 3 ; it is usually shown at the foot of the table to save horizontal space.
Naturally occurring neodymium (60 Nd) is composed of five stable isotopes— 142 Nd, 143 Nd, 145 Nd, 146 Nd and 148 Nd, with 142 Nd being the most abundant (27.2% of the natural abundance)—and two radioisotopes with extremely long half-lives, 144 Nd (alpha decay with a half-life (t 1/2) of 2.29 × 10 15 years) and 150 Nd (double beta decay, t ...
This list of chemical elements named after places includes elements named both directly and indirectly for places. 41 of the 118 chemical elements have names associated with, or specifically named for, places around the world or among astronomical objects.
This is a list of chemical elements and their atomic properties, ordered by atomic number (Z).. Since valence electrons are not clearly defined for the d-block and f-block elements, there not being a clear point at which further ionisation becomes unprofitable, a purely formal definition as number of electrons in the outermost shell has been used.
41 Niobium: List: 80 Nb 81 Nb 82 Nb 83 Nb 84 Nb 85 Nb 86 Nb 87 Nb 88 Nb 89 Nb 90 Nb 91 Nb 92 Nb 93 Nb 94 Nb 95 Nb 96 Nb 97 Nb 98 Nb 99 Nb 100 Nb 101 Nb 102 Nb 103 Nb 104 Nb 105 Nb 106 Nb 107 Nb 108 Nb
Charles Hatchett named element 41 columbium in 1801 [4] (Cb), [5] but after the publication of On the Identity of Columbium and Tantalum by William Hyde Wollaston in 1809, the claims of discovery of Hatchett were mistakenly considered refuted. [6] In 1846, Heinrich Rose discovered that tantalite contained an element similar to tantalum and ...
The first table is for even-atomic numbered elements, which tend to have far more primordial nuclides, due to the stability conferred by proton-proton pairing. A second separate table is given for odd-atomic numbered elements, which tend to have far fewer stable and long-lived (primordial) unstable nuclides. [citation needed]