Plzz best answer will get marked (sorry cant spell)radioisotopes often emit alpha particles, beta particles, or gamma rays. the distance they travel through matter increases in order from alpha to gamma. each radioisotope has a characteristic half-life, which is the time needed for half of a sample of radioisotope to undergo nuclear decay. the table lists isotopes of the element calcium. based on the table, which isotope is best suited for use as a radioactive tracer for the body’s use of calcium? calcium-40calcium-45calcium-47calci um-49