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It's thought that another one of these magic numbers lies just beyond the range of currently known elements, which means we could potentially discover some new elements that are relatively stable and extremely massive. There are believed to be certain numbers/ratios that are inherently more stable. Other examples of big ideas that have been the focus of a learning progression are: matter and atomic molecular theory (Smith et al., 2006), force and motion (Alonzo and Steedle, 2008), natural. Hence, larger atoms become more unstable. The ratio of neutrons to protons gradually increases to try to compensate, but this results in the neutrons getting more unstable themselves, resulting in more opportunity for weak forces to destabilize them. Isotopes of an element contain different numbers of neutrons. Each element has its own atomic number, which is equal to the number of protons in its nucleus. Atoms themselves are composed of protons, neutrons, and electrons. With all of that to consider, as you get larger and larger nuclei with more protons, the electromagnetic forces increase, as well as the distances in the nuclei, putting more strain on the nuclear forces holding it all together. Chemistry is based on the modern atomic theory, which states that all matter is composed of atoms. Molecular orbitals are approximate solutions to the Schrödinger equation for the electrons in the electric field of the molecules atomic nuclei.
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Neutrons will help add to this nuclear force, but they tend to become unstable when they get into too great of concentration and the weak force will cause them to decay into protons. A molecular orbital (MO) can be used to represent the regions in a molecule where an electron occupying that orbital is likely to be found. Fusion allows these protons to get close enough together for the stronger, yet short ranged, nuclear force to overpower the electromagnetic force. The multifaceted role of theoretical physics in understanding the earliest stages of radiation action is discussed. The electromagnetic force of the protons wants to push them away from each other. There are several forces at work inside the nuclei of atoms.