Group 17
Please brainliesttt
Answer:
A. to cure human diseases
Explanation:
Potassium -40half life = 1.28 ×10∧9.
Radioisotope can be used to determine the age of fossils, to treat skin disease, to sterilize foodstuffs, and also to sterilize surgical instruments.
Radioisotope dating is a way to estimate a fossil's age by a method of analyzing the elemental isotopes which are within the rocks which it is in.
NaPO4 + KOH -> KPO4 + NaOH
already balance