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Gallium is a chemical element; it has the symbol Ga and atomic number 31. Discovered by the French chemist Paul-Émile Lecoq de Boisbaudran in 1875, [13] gallium is in group 13 of the periodic table and is similar to the other metals of the group (aluminium, indium, and thallium).
The definitive visualisation of all 118 elements is the periodic table of the elements, ... 31 Ga Gallium: Latin Gallia 'France' 13 4 p-block 69.723: 5.91: 302.9146 ...
For reasons of space, [30] [31] the periodic table is commonly presented with the f-block elements cut out and positioned as a distinct part below the main body. [32] [30] [23] This reduces the number of element columns from 32 to 18. [30] Both forms represent the same periodic table. [6]
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.
31 Gallium: List: 56 Ga 57 Ga 58 Ga 59 Ga 60 Ga 61 Ga 62 Ga 63 Ga 64 Ga 65 Ga 66 Ga 67 Ga 68 Ga 69 Ga 70 Ga 71 Ga 72 Ga 73 Ga 74 Ga 75 Ga 76 Ga 77 Ga ...
In the periodic table of the elements, each numbered row is a period. A period on the periodic table is a row of chemical elements. ... 31 Ga: 32 Ge: 33 As: 34 Se: 35 ...
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Here [Ne] refers to the core electrons which are the same as for the element neon (Ne), the last noble gas before phosphorus in the periodic table. The valence electrons (here 3s 2 3p 3) are written explicitly for all atoms.