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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.
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.
English: An SVG periodic table of the elements, which includes name, atomic mass, electron configuration, first ionization energy, and electronegativity. Română: Un table periodic al elementelor în format SVG, ce include numele, masa atomică, configurația electronică, energia de ionizare primară și electronegativitatea.
There are currently seven complete periods in the periodic table, comprising the 118 known elements. Any new elements will be placed into an eighth period; see extended periodic table. The elements are colour-coded below by their block: red for the s-block, yellow for the p-block, blue for the d-block, and green for the f-block.
Lanthanum 57 La 138.91: Cerium 58 Ce 140.12: Praseodymium 59 Pr 140.91: Neodymium 60 Nd 144.24: Promethium 61 Pm [145] Samarium 62 Sm 150.36: Europium 63 Eu 151.96: Gadolinium 64 Gd 157.25: Terbium 65 Tb 158.93: Dysprosium 66 Dy 162.50: Holmium 67 Ho 164.93: Erbium 68 Er 167.26: Thulium 69 Tm 168.93: Ytterbium 70 Yb 173.05 ...
1914 — Hackh's periodic table: First spiral to take account of Mosley's atomic numbers, and the first to show successively larger pairs of coils. Also interesting as H stands alone in the centre [77] 1925 — Courtines's a model of the periodic table: A helix with the appearance of a submarine or a castle [78]
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.
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