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The door number of phosphorous is 15. If 16 neutrons are accompanying then the mass number would become 31. Thus 15P31 is the most quiet isotope of phosphorous.

But if one neutron is less the phosphorous-30 and if neutron is more then phosphorous-32. These two isotopes are radioactive. Hence these are named as radio isotopes. P-32 is used as tracer in agriculture. Also used in curing skin disease in medical field.

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15y ago

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