| Chemistry is about the study of atoms and elements, as well as the relations with atoms, and how they can form bonds. Chemistry is also about subatomic particles, the particles inside an atom. The simplest unit of all matter are atoms, which bond together to form molecules. They are also made up of "subatomic" particles, including protons, neutrons, and electrons. Protons and electrons make up the nucleus of the atom, while electrons orbit around it (in the electron cloud). And those subatomic particles are made up of even smaller matter, called quarks. The number of protons within an atom makes up the atomic number. Hydrogen is an element with only one proton, but it can have zero, one, or two neutrons, but it is still called a hydrogen (same thing with electrons) atom. An element with two protons are always called helium, regardless of the number of neutrons, and electrons. Protons have a positive electrical charge, neutrons none (or zero), and electrons have a negative electrical charge. (Protons +1, neutrons 0, and electrons -1). With that you can expand (2 protons +2, 2 neutrons still zero, and 2 electrons -2). Because protons and electrons have opposite electrical forces, electrons will always spin around the nucleus. |
Knowledge ---------------- Orbital Subshell (Aufbau Principle) Bond Compound Element Human Body Stoichiometry Subatomic Particle Thermodynamics ---------------- Dictionary Facts |
| Chemistry |