A) 1 g of Ra
B) 1 g of Ra \[S{{O}_{4}}\]
C) 1 g of Ra \[B{{r}_{2}}\]
D) 1 g of Ra \[(HP{{O}_{4}})\]
Correct Answer: A
Solution :
Since radium is most radioactive among all the radioactive compounds, therefore it has the highest value of radioactivity.
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