Question

what is radium and plutonium?​

Answer 1

• Plutonium is a radioactive chemical element with the symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized.
• Radium is a chemical element with the symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals

Answer 2

Explanation:

Those included the difference in their radioactivities and that of their daughters and the difference in the average energy of their alpha particles. The result indi- cated that, gram for gram, plutonium was a factor of 50 less toxic than radium, and the standard was set to 5 micrograms.