出典:Wiktionary
出典:『Wiktionary』 (2026/04/30 19:48 UTC 版)
| Chemical element | ||||||||
|---|---|---|---|---|---|---|---|---|
| Na Atomic number 11 sodium |
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| Previous: ← neon (Ne) | ||||||||
| Next: magnesium (Mg) → | ||||||||
| English Wikipedia article on Sodium |
sodium (usually uncountable, plural sodiums)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/08 18:19 UTC 版)
Sodium (
/ˈsoʊdiəm/ soh-dee-əm) is a metallic element with a symbol Na (from Latin natrium or Persian ناترون natrun; perhaps ultimately from Egyptian netjerj), and atomic number 11. It is a soft, silvery-white, highly reactive metal and is a member of the alkali metals within "group 1" (formerly known as 'group IA'). It has one stable isotope, 23Na.
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