What is the complementary atomic number 81, atomic mass number 201,?
Sounds like a light isotope of thallium. The +1 charge indicates an ion of thallium. [superscripted]201Tl(1+) or 201/81Tl(1+).
Sounds like a light isotope of thallium. The +1 charge indicates an ion of thallium. [superscripted]201Tl(1+) or 201/81Tl(1+).