1. In a list that only singer-comedian Tom Lehrer could love, hydrogen,  lithium, boron, carbon, nitrogen, oxygen, silicon, sulfur, chlorine and  thallium now all have new mass definitions.

    In a list that only singer-comedian Tom Lehrer could love, hydrogen, lithium, boron, carbon, nitrogen, oxygen, silicon, sulfur, chlorine and thallium now all have new mass definitions.

  2. the elements

    atomic mass number

    amu

    chemistry

    tom lehrer