what do you think you know about physics, physics is the study of matter under the effect of energy, but does this includes solid states bodies, atoms at ground states, object at microscopic size or object moving faster than light? these and more is what prompt me to ask again what is physics?
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determine what type of decay occurs when thorium-231 undergoes radioactive decay to form protactinium-231
23190Th→? + 23191Pa
sine the atomic number increases by one and the mass remain unchanged ,
this is a beta decay. therefore the above equation is
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