Hazards and Electrons

• when electrons more further from the nucleus...

  the atom has absorbed EM radiation
• when the electron moves closer to the nucleus

  the atom has emitted EM Radiation
• when can an electron leave the atom to form an ion

  if it has gained enough energy
• where do gamma rays originate from

  changes in the nucleus of an atom
• which rays are hazards

  UV light, X ray and gamma
• what is radiation dose

  how much exposure leads to harm for a person
• affects of UV radiation

  skin ages prematurely, increasing risk of skin cancer
• affects of X rays and gamma rays (ionisation radiation)

  can cause mutation of genes - causing cancer