Isotopes?
An isotope is a form of a chemical element whose atomic nucleus contains a specific number of neutron s, in addition to the number of proton s that uniquely defines the element. Every chemical element has more than one isotope. For any element, one of the isotopes is more abundant in nature than any of the others, although often multiple isotopes of a single element are mixed. (Isotopes)
The nucleon number is customarily written as a superscript preceding the chemical symbol for the element. (Isotopes)
An isotope is a form of a chemical element whose atomic nucleus contains a specific number of neutron s, in addition to the number of proton s that uniquely defines the element. Every chemical element has more than one isotope. For any element, one of the isotopes is more abundant in nature than any of the others, although often multiple isotopes of a single element are mixed. (Isotopes)
The nucleon number is customarily written as a superscript preceding the chemical symbol for the element. (Isotopes)