Na
元素符号:Na
中文名称:钠
英文名称:Sodium
原子序数:11
原子量:22.99
外围电子排布:3s1
核外电子排布:2,8,1
常见化合价:+1
密度:0.971
溶点:97.81
沸点:882.9
所属周期:3
所属族数:IA
原子半径:2.23
离子半径:1.02(+1)
共价半径:1.54
同位素及放射性:Na-23
发现人:Sir Humphrey Davy
发现时间:1807
发现地点:英格兰
名称由来:Medieval Latin: sodanum, (headache remedy); symbol from Latin natrium, (sodium carbonate).
元素描述:Soft silvery-white metal. Sixth most abundant element in the earth's crust. Burns in air with a brilliant white flame.
元素来源:Obtained by electrolysis of melted sodium chloride (salt), borax and cryolite.
元素用途:There are few uses for the pure metal, however its compounds are used in medicine, agriculture and photography. Sodium chloride (NaCl) is table salt. Liquid sodium is sometimes used to cool nuclear reactors.