搜尋結果
- 鈉
- ㄋㄚˋ
- 釋義：
- [名] （sodium，Na）化學元素。原子序11。鹼金屬元素之一。銀白色，質軟具延展性。在空氣中極易氧化，遇水則劇烈反應產生氫氣，需貯存於石油中。主要以化合物型態存在，如食鹽。亦可做還原劑及熱交換劑，用途甚廣。
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. Sodium is the sixth most abundant element in the Earth's crust and exists in numerous minerals such as feldspars, sodalite, and halite (NaCl).
- silvery white metallic
- group 1: hydrogen and alkali metals
- 11
- period 3
Sodium silicate is a generic name for chemical compounds with the formula Na. 2xSi. yO. 2y+x or (Na. 2O) x · (SiO. 2) y, such as sodium metasilicate Na. 2SiO. 3, sodium orthosilicate Na. 4SiO. 4, and sodium pyrosilicate Na. 6Si. 2O. 7. The anions are often polymeric.
Sodium hypochlorite is an alkaline inorganic chemical compound with the formula Na O Cl (also written as NaClO). It is commonly known in a dilute aqueous solution as bleach or chlorine bleach. [4] . It is the sodium salt of hypochlorous acid, consisting of sodium cations ( Na+) and hypochlorite anions ( −OCl, also written as OCl− and ClO− ).
Sodium carbonate (also known as washing soda, soda ash and soda crystals) is the inorganic compound with the formula Na2CO3 and its various hydrates. All forms are white, odourless, water-soluble salts that yield alkaline solutions in water.
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Footnotes. See also. References. External links. Borax (also referred to as sodium borate, tincal ( / ˈtɪŋkəl /) and tincar ( / ˈtɪŋkər / )) is a salt ( ionic compound), a hydrated or anhydrous borate of sodium, with the chemical formula Na 2 H 20 B 4 O 17 (also written as Na 2 B 4 O 7·10H2O [1] [a] ).
Water is an inorganic compound with the chemical formula H2O. It is a transparent, tasteless, odorless, [c] and nearly colorless chemical substance, and it is the main constituent of Earth 's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent [19] ).
