The isotopic composition of rubidism is .^(85)Rb, 72% and .^(87)Rb 28% is weaklyradioactive and .^(87)Rb, 28%. .^(87)Rb si weakly radioactive and decays by beta- emission with a decayconstant of 1.1xx10^(-11) per year. A sample of the minearl pollucite was found to contain 450mg Rb and 0.72 mg of .^(87)Sr. Estimate the age of polluucite.

The isotopic composition of rubidism is .^(85)Rb, 72% and .^(87)Rb 28%

1.	The isotopic composition of rubidism is .^(85)Rb, 72% and .^(87)Rb 28% is weaklyradioactive and .^(87)Rb, 28%. .^(87)Rb si weakly radioactive and decays by beta- emission with a decayconstant of 1.1xx10^(-11) per year. A sample of the minearl pollucite was found to contain 450mg Rb and 0.72 mg of .^(87)Sr. Estimate the age of polluucite.
Answer» ANSWER :`5.18xx10^(8)` YEAR