![]() ![]() Two atoms with an identical number of protons in their nuclei belong to the same element. The number of protons in the nucleus also defines in large part the characteristics of an atom-is it a gas or a metal, for example. The number of protons in the nucleus, known as the "atomic number," primarily determines where that atom fits on the Periodic Table. The nucleus (or center) of an atom is made up of protons and neutrons. Likewise, just as when you experience resistance trying to push the same ends of two magnets together, protons are repelled from other protons and electrons are repelled from other electrons. So, much like opposite ends of a magnet, protons and electrons are attracted to each other. ![]() A fundamental rule is that particles with the same charge are repulsed from each other, while particles with opposite charges are attracted to each other. Neutrons, on the other hand, don't have a charge. Two of the subatomic particles have electrical charges: protons have a positive charge while electrons have a negative charge. There are three subatomic particles: protons, neutrons and electrons. Given that these particles make up atoms, they are often referred to as subatomic particles. While its name originally referred to a particle that couldn't be divided any more-the smallest thing possible-we now know that each atom is generally made up of smaller particles. Anything that has a mass-in other words, anything that occupies space-is composed of atoms. The atom is considered the basic building block of matter. ![]() Printable Version The Nuclear Regulatory Commission's Science 101: What is an Atom? ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |