PARTICLES RADIOACTIVITY ATOMIC NUCLEUS DOWN SMALLER NUCLEAR RADIATION ALPHA PARTICLES POSITIVELY CHARGED BETA PARTICLES NEGATIVELY CHARGED GAMMA PARTICLES NO CHARGE INCREASING FINALLY ENERGETIC ALPHA BETA GAMMA HALF RADIOACTIVE NUCLEUS NUCLEUS AS IT IT CHANGES TERM TAKES ATOMS SAMPLE URANIUM TRY THIS AT HOME SOMETHING AMOUNT ELEMENT UNIQUE WAIT RADIOACTIVE THINGS THE ORIGINAL CHANGE RADIOACTIVE ISOTOPE NORMAL CARBON EXTRA NEUTRONS SCIENTISTS PROCESS CARBON DATING CARBON ATOMS GO OUT THE MALL MEASURE THE AGE VERY SMALL THE ATMOSPHERE EVERY LIVING THING DIG UP TO ESTIMATE RELY DATE DANGER DNA GENERALLY GOOD LIVING TIMES RADIATION RIGHT ORGANISMS HITS EXPOSED MODERATE CELLS REPRODUCE NOT NORMAL HIGH KILL HUMAN LEARNED HOW TO STOP KNOW THAT KILLS DOCTORS TARGET AREAS CANCER CANCER CELLS SEARCH OVERVIEW NUCLEAR PHYSICS QUANTUM PHYSICS FISSION FUSION TOPICS NASA RELATED LINKS ATOMIC STRUCTURE ISOTOPES ENERGY RESOURCES SOLAR RADIATION THE SUN STARS USEFUL REFERENCE MATERIALS WIKIPEDIA ENCYCLOPDIA MOTION THERMODYNAMICS ELECTRICITY MAGNETISM LIGHT OPTICS MODERN PHYSICS SITE TOUR SITE MAP HOME PAGE NETWORK SCIENCE MATH HELP PHYSICS THE SITE ANDREW ALL RIGHTS RESERVED CURRENT MONITOR OR REVIEW CONTENT AVAILABLE EXTERNAL PAID ADVERTISEMENTS NEITHER PARTNERS BOOKS POINTS PLEASE RESEARCH YOUR