As
元素符号:As
中文名称:砷
英文名称:Arsenic
原子序数:33
原子量:74.92
外围电子排布:4s2 4p3
核外电子排布:2,8,18,5
常见化合价:-3,+3,+5
密度:5.72
溶点:817
沸点:613 升华
所属周期:4
所属族数:VA
原子半径:1.33
离子半径:0.58(+5)
共价半径:1.20
同位素及放射性:As-75
发现人:Known to the ancients.
发现时间:
发现地点:
名称由来:Greek: arsenikon; Latin: arsenicum, (both names for yellow pigment).
元素描述:Steel-gray, brittle semi-metal.
元素来源:Found in mispickel (arsenopyrite)
元素用途:Many of its compounds are deadly poison and used as weed killer and rat poison. Conducts electricity. Used in semiconductors. Some compounds, called arsenides, are used in the manufacture of paints, wallpapers, and ceramics.