Ar
元素符號(hào):Ar
中文名稱:氬
英文名稱:Argon
原子序數(shù):18
原子量:39.95
外圍電子排布:3s2 3p6
核外電子排布:2,8,8
常見(jiàn)化合價(jià):0
密度:0.0017824
溶點(diǎn):-189.2
沸點(diǎn):-185.7
所屬周期:3
所屬族數(shù):0
原子半徑:0.88
離子半徑:
共價(jià)半徑:0.98
同位素及放射性:Ar-36 Ar-38 *Ar-40
發(fā)現(xiàn)人:Sir William Ramsey,Baron Rayleigh
發(fā)現(xiàn)時(shí)間:1894
發(fā)現(xiàn)地點(diǎn):蘇格蘭
名稱由來(lái):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%.
元素來(lái)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.