The half life of radium is 1600 years. The fraction of a

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

1. 1/4
2. 1/2
3. 1/8
4. 1/16

Correct Option: D

	N	=		1		^6400/1600
	N₀			2

=		1		⁴	=	1
		2				16