what is radium?who discovere it?
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Answer: 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. Pure radium is silvery-white, but it readily reacts with nitrogen on exposure to air, forming a black surface layer of radium nitride.
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Radium is a radioactive element. It was first found by Madam Curie. It's atomic number is 88. It comes in nobel gas group. It's octet is complete and it do not react with other elements.
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