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QAIPMT-2004-Ph-2627: NEET 2004 Physics - Class 12 AIPMT-2004-Ph-2627 Solution: The half life of radium is about 1600 years. Of 100 g of radium …
The half life of radium is about 1600 years. Of 100 g of radium existing now, 25 g will remain unchanged after
Multiple Choice Options
- A 4800 years
- B 6400 years
- C 2400 years
- D 3200 years
Step-by-Step Verified Solution
N = N 0 ( 1 2 ) n
_ 25 100 = ( 1 2 ) n
_ n = 2
The total time in which radium change to 25 g is
= 2 _ 1600 = 3200 yr.