锘是一种人工获得的放射性元素(1957年)，它的化学符号是No，它的原子序数是102，属于锕系元素之一。

锘的拼音名称是以瑞典化学家阿尔弗雷德·诺贝尔而命名。他亦是创建诺贝尔奖的人。

锘-261是最稳定的同位素，半衰期有170分钟。其次是锘-259，半衰期有58分钟。

锘-254的半衰期是55秒。

Nobelium is a synthetic chemical element with symbol No and atomic number 102. It is named in honor of Alfred Nobel, the inventor of dynamite and benefactor of science. A radioactive metal, it is the tenth transuranic element and is the penultimate member of the actinide series. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. A total of twelve nobelium isotopes are known to exist; the most stable is No with a half-life of 58 minutes, but the shorter-lived No (half-life 3.1 minutes) is most commonly used in chemistry because it can be produced on a larger scale.