A nucleus of an atom can be compared to the sun of a solar system because the nucleus, like the sun, is the largest part of an atom and its electrons orbit around it, much like planets in a solar system. Atoms can also gain or lose electrons similarly to how stars can gain or lose planets.Know More
However, it is important to note a few areas where atoms and solar systems differ. Stars keep planets in orbit through gravity, while nuclei hold electrons through nuclear forces. In addition, experts often emphasize that electrons are not in orbit in the same way that planets are. The location of an electron is probabilistic, so it is not possible to know exactly where it is located at any particular time. In some ways, electrons are in multiple locations at once and they only exist at a specific point if they are observed or otherwise forced to "choose" a position.
However, experts still generally use the solar system model as a means of making the concepts understandable. Since atoms typically operate differently than objects people encounter on a daily basis, analogies make them understandable, and the orbit analogy has proven popular throughout the years.Learn more about Atoms & Molecules
The nucleus of an atom is surrounded by particles called electrons. These electrons revolve around the nucleus in paths called orbitals, which vary in their complexity.Full Answer >
The first ionization energy generally decreases down a group due to the increasing distance of the valence electrons from the nucleus of an atom. The increasing gap lowers the attractive force of the protons that pull the electrons closer to the nucleus.Full Answer >
The center of an atom is called the atom's nucleus. This structure is usually composed of protons and neutrons though some atoms of hydrogen have only protons.Full Answer >
Both protons and neutrons are found in the nucleus of an atom. The third type of particle that an atom has, electrons, are found in orbitals outside of the nucleus.Full Answer >