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.
Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation.nother possibility is that only a portion of one molecule is transferred to the other molecule. This type of reaction occurs, for example, in redox and acid-base reactions. In redox reactions, the transferred particle is an electron, whereas in acid-base reactions it is a proton.