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Usually parameters reproduce the value, and the template adds the SI unit or additional standard text. While the topic is technical, we can strive to make the result readable text, and even verbose. For example, this is why the template writes "(at 0 °C)". For this, you may want to experiment with parameter input too - or propose improvements.
Protactinium exists in two major oxidation states: +4 and +5, both in solids and solutions; and the +3 and +2 states, which have been observed in some solids. As the electron configuration of the neutral atom is [Rn]5f 2 6d 1 7s 2, the +5 oxidation state corresponds to the low-energy (and thus favored) 5f 0 configuration.
Electron configurations of the chemical elements (neutral gaseous atoms in the ground state; ... Template documentation. Usage. See also. This page was last ...
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This is a documentation subpage for Template:Periodic table (electron configuration). It may contain usage information, categories and other content that is not part of the original template page. Usage
As an approximate rule, electron configurations are given by the Aufbau principle and the Madelung rule. However there are numerous exceptions; for example the lightest exception is chromium, which would be predicted to have the configuration 1s 2 2s 2 2p 6 3s 2 3p 6 3d 4 4s 2 , written as [Ar] 3d 4 4s 2 , but whose actual configuration given ...
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