鎇者,亦作鋂,化學元素也,符號Am,原子序九十五,屬錒系,遇氧漸啞,弱具放射性,乃人工製之。一九四四年,美國人西博格、詹姆斯、摩根得諸鈈。
同位素者,皆具放射性,性稍穩者有二。鎇二四三者,每七千三百七十年減半。鎇二四一者,每四百五十八年減半。
鎇二四一者,乃鈈於核電之副產,可大量產之,其價宜甚,可作同位素測厚儀、煙霧探測器之類。
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