கேள்வி: தனிமங்களின் எண் பட்டியல் - Notes பற்றி நீங்கள் என்ன அறிந்துள்ளீர்கள்?
பதில்: * The element does not have any stable nuclides, and a value in brackets, e.g. [209], indicates the mass number of the longest-lived isotope of the element or characteristic isotopic composition. * The isotopic composition of this element varies in some geological specimens, and the variation may exceed the uncertainty stated in the table. * The isotopic composition of the element can vary in commercial materials, which can cause the atomic weight to deviate significantly from the given value. * The isotopic composition varies in terrestrial material such that a more precise atomic weight can not be given. * The atomic weight of commercial Lithium can vary between 6.939 and 6.996—analysis of the specific material is necessary to find a more accurate value.