and the sum of the protons and neutrons gives the atomic mass, the number of neutrons defines the isotope of that element. For example, most carbon (≈ 99 %) has 6 protons and 6 neutrons and is written ...

textrm{N}\) and \(_{6}^{14}\textrm{C}\) are not isotopes. They have the same mass number, A, but different atomic number, Z, and different chemical symbol - they are not the same element.

Uranium (chemical symbol U) is a naturally occurring radioactive element ... In its natural state, it consists of three isotopes (U-234, U-235 and U-238). Other isotopes that cannot be found in ...

Since this podcast was first published, the name of this element has been ratified as flerovium (symbol Fl) by the International ... half life measured in microseconds, element 114's isotope with ...