Which of the following statements is true?Group of answer choicesFor any particular radionuclide, whatever the size of the sample, the activity always remains the constant.For any particular radionuclide, whatever the size of the sample, the same percentage of its atoms are always transformed in the same interval of time. Activity will decrease with time as more atoms decay.For any particular radionuclide the percentage of its atoms transformed in an interval of time depends on the size of the sample. A larger sample has a larger activity.For any particular radionuclide, whatever the size of the sample, the same number of its atoms are always transformed in the same interval of time. Activity will decrease

Which of the following are true about radiosensitivity?  Select all that apply.Group of answer choicesIt is proportional to the rate of cell divisionIt varies with the cell cycleIt has no dependence on total doseIt varies with a person’s ageIt depends on the linear energy transfer of the radiationIt is similar for all cells in the body

Which one of the following decreases over time?Group of answer choicesthe decay ratethe number of parent atomsthe number of daughter atomsthe length of a half-life

Which of the following statement is correctA Atomic size decreases down the groupB Atomic size increases across the periodC Anions are smaller than the parent atomD Cations are smaller than the parent atom

Which one of the following statements is TRUE?*1 pointAll isotopes of an element are radioactiveAll unstable isotopes of an element are radioactiveAll isotopes of an element, apart from the most abundant one, are radioactiveAll radioisotopes decay by emitting alpha particles

A radioactive substance is oxidised. What changes would you expect to takeplace in radioactivity? State your reason