元素符号Ar表示什么物质~高手进~

最佳答案 - 由投票者2008-06-05 06:06:28选出

Ar
元素符号:Ar
中文名称:氩
英文名称:Argon
原子序数:18
原子量:39.95
外围电子排布:3s2 3p6
核外电子排布:2,8,8
常见化合价:0
密度:0.0017824
溶点:-189.2
沸点:-185.7
所属周期:3
所属族数:0
原子半径:0.88
离子半径:
共价半径:0.98
同位素及放射性:Ar-36 Ar-38 *Ar-40
发现人:Sir William Ramsey, Baron Rayleigh
发现时间:1894
发现地点:苏格兰
名称由来:Greek: argos (inactive).
元素描述:Colorless, odorless, tasteless noble gas. It is the third most abundant element in the earth's atmosphere and makes up about 1%.
元素来源:Continuously released into the air by decay of radioactive potassium-40. Pure form is obtained from fractional distillation of liquid air.
元素用途:Used in lighting products. It is often used in filling incandescent light bulbs. Some is mixed with krypton in fluorescent lamps. Crystals in the semiconductor industry are grown in argon atmospheres.