নামের ভিত্তিতে মৌলসমূহের তালিকা

নাম প্রতীক পারমাণবিক সংখ্যা পারমাণবিক ভর শ্রেণী পর্যায়
Actinium Ac 89 [227][১]   7
Aluminum; see Aluminium Al
Americium Am 95 [243][১]   7
Antimony (Stibium) Sb 51 121.760(1)[২] 15 5
  1. 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. However, three elements, Thorium, Protactinium, and Uranium, have a characteristic terrestrial isotopic composition, and thus their atomic mass given.
  2. The isotopic composition of this element varies in some geological specimens, and the variation may exceed the uncertainty stated in the table.