An alpha particle is a ____ nucleus ( 2 protons and 2 ____). When the particle is emitted, the ____ decreases by ____and the ____ decreases by 2. These particles can travel ____. ____ can stop this type of radiation. It damages DNA in the cells if ____. There are some ____ to alpha radiation (cancer treatment, smoke detectors, thermoelectric generators). If isotope Thormium-230 experiences alpha decay, it will become ____.

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