1 Common rashes include eczema, poison ivy, hives, and athlete's foot. 2  Infections that cause rashes may be fungal, bacterial, parasitic, or viral.  Over-the-counter products may be helpful treatments for many skin rashes.
The conditions under which this process occurs happen in two ways. According to the Cornell Center for... Atoms emit a photon when an electron falls from a high-energy state to a low-energy state. The conditions under which this process occurs happen in two ways. According to the Cornell Center for...
Particle Emissions. Radioactive elements produce some radiation in the form of neutrons and alpha and beta particles. Heavier elements such as uranium emit neutrons when they split to form lighter elements. Some radioactive substances emit alpha particles, which are helium nuclei -- two neutrons and two protons.