A configuration composed of Photons & Neutrons is called Nuclide's. There are 3000 nuclide's approximately all together (270 nuclide's are naturally forms)
No
Decay series
yes
23892U
No. Some are stable.
Heavy nuclides are atoms that have a high atomic number and are typically found in the lower region of the periodic table, such as elements like lead, uranium, and thorium. These nuclides often have a high mass and can be unstable, leading to radioactive decay.
Isotones, isotonic nuclides
Carbon-14
Unstable nuclides undergo nuclear reactions in order to become more stable. These reactions involve the nucleus gaining or losing subatomic particles in an attempt to achieve a more favorable balance of protons and neutrons. By undergoing nuclear reactions, unstable nuclides can transform into more stable isotopes with lower energy states.
Yes. From a technical point of view, all elements have isotopes (nuclides) that are radioactive and therefore have half-lives. But the majority of these are artificial - man made, and do not occur in nature on Earth. Even hydrogen has nuclides of deuterium and tritium, deuterium is stable and natural, and tritium has a half life of 12.33 years. Having said that, there are a number of nuclides that are stable and occur naturally.
Isotopes
No they're neutron rich.