The âprodromal syndromeâ is not a diagnosis, but the technical term used by mental health professionals to describe a specific group of symptoms that may precede the onset of a mental illness. For example, a runny-nose is often âprodromalâ to (happening before) a cold, which means that a runny-nose may be a risk factor for developing this illness.
These are all that have importance in chemistry. There are some other very small particles, but they are studied by physicists in the field of nuclear particle physics. Electrons are the only particle involved in chemical reactions. Atoms form compounds using chemical reactions. 7 people found this useful.
Chemical Bonding and Reactions. STUDY. PLAY. atom. smallest part of an element that has all the properties of an element, (physics and chemistry) the smallest component of an element having the chemical properties of the element. chemical bonding. combining of atoms of elements to form new substances. valence electron. electron in the outermost energy level of an atom.