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Sodium is a chemical element; it has symbol Na (from Neo-Latin natrium) and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23 Na. The free metal does not occur in nature and must be prepared from compounds.
There are 20 isotopes of sodium (11 Na), ranging from 17 Na to 39 Na (except for the still-unknown 36 Na and 38 Na), [4] and five isomers (two for 22 Na, and one each for 24 Na, 26 Na, and 32 Na). 23 Na is the only stable (and the only primordial) isotope. It is considered a monoisotopic element and it has a standard atomic weight of 22.989 769 ...
Sodium atoms have 11 electrons, one more than the stable configuration of the noble gas neon. As a result, sodium usually forms ionic compounds involving the Na + cation. [1] Sodium is a reactive alkali metal and is much more stable in ionic compounds. It can also form intermetallic compounds and organosodium compounds.
A Na 0.67 Mn 1−x Mg x O 2 cathode material exhibited a discharge capacity of 175 mAh/g for Na 0.67 Mn 0.95 Mg 0.05 O 2. This cathode contained only abundant elements. [42] Copper-substituted Na 0.67 Ni 0.3−x Cu x Mn 0.7 O 2 cathode materials showed a high reversible capacity with better
Sodium (symbol Na) is a soft, silvery-white, highly reactive metal and is a member of the alkali metals; its only stable isotope is 23 Na. It is an abundant element that exists in numerous minerals such as feldspars , sodalite and rock salt .
Even with this proviso, the electrode potentials of lithium and sodium – and hence their positions in the electrochemical series – appear anomalous. The order of reactivity, as shown by the vigour of the reaction with water or the speed at which the metal surface tarnishes in air, appears to be Cs > K > Na > Li > alkaline earth metals,
The periodic table, elements being denoted by their symbols. Chemical symbols are the abbreviations used in chemistry, ... Sodium: 11: Current symbol is Na. [nb 1] Sq:
Sodium, 11 Na; Sodium; Appearance: silvery white metallic: Standard atomic weight A r °(Na) ... Theoretical element Applied: when element is theoretical (E119 and ...