See Isotopes of hydrogen for an example
Zinc-68 is a non-radioactive isotope of zinc. It has special application in the noninvasive determination of human zinc requirements, metabolic diseases, liver disease, alcoholism, nutritional requirements and utilization studies. Zinc metal is also available in ultra high purity and as nanoparticles. For thin film applications it is available as rod, pellets, pieces, granules and sputtering targets and as either an ingot or powder. Zinc-68 is considered non-toxic in healthy doses but can cause nausea if taken in excess.
Information
Zinc is a d-block, Group 12, Period 4 element. The number of electrons in each of Zinc's shells is 2, 8, 18, 2, and its electronic configuration is [Ar] 3d10 4s2. In its elemental form zinc's CAS number is 7440-66-6. The zinc atom has a radius of 133.5.pm and its Van der Waals radius is 139.pm. Combined with other elements as ores, Zinc is found in nature. Zinc is a bluish-white, lustrous metal which is sometimes produce in Special High Grade (SHG) purities. It is a fair conductor of electricity, and burns in air at high red heat with evolution of white clouds of the oxide.