To split off one or more electrons from an atom, thus leaving it with a positive electric charge The electrons usually attach to other atoms or molecules, giving them a negative charge
Turn into an ion or charged particle ionizing radiation - Electromagnetic radiation that has sufficient energy to cause the loss of one or more electrons from atoms or molecules, thereby ionizing them
to make an atom or molecule of an element lose an electron, as by X-ray bombardment, and thus be converted into a positive ion The freed electron may attach itself to a neutral atom or molecule to form a negative ion