# NEET Physics Nuclei Questions Solved

The half life period of radium is 1600 years. The fraction of a sample of radium that would remain after 6400 years is

(a) $\frac{1}{4}$             (b) $\frac{1}{2}$
(c) $\frac{1}{8}$             (d) $\frac{1}{16}$

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