Focus On Physical Science: California Grade 8

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1.			How many days is the half-life for exp145Er? Need a Hint?
			A)	0.9 d
			B)	0.0000104 d
			C)	0.015 d
			D)	0.00025 d
2.			How many days is the half-life for exp156Er? Need a Hint?
			A)	0.000036 d
			B)	0.325 d
			C)	0.0135 d
			D)	0.0054 d
3.			How many minutes is the half-life for exp169Er? Need a Hint?
			A)	13,536 m
			B)	225.6 m
			C)	564 m
			D)	33,840 m
4.			How many days is the half-life for exp147Er? Need a Hint?
			A)	0.104 d
			B)	0.042 d
			C)	0.000694 d
			D)	0.000029 d
5.			How many hours is the half-life for exp145Er? Need a Hint?
			A)	0.0375 h
			B)	0.015 h
			C)	0.00025 h
			D)	0.54 h
6.			How many hours is the half-life for exp169Er? Need a Hint?
			A)	225.6 h
			B)	564 h
			C)	13,536 h
			D)	33,840 h
7.			How many days is the half-life for exp158Er? Need a Hint?
			A)	0.095 d
			B)	0.038 d
			C)	0.00064 d
			D)	54.96 d
8.			How many hours is the half-life for exp156Er? Need a Hint?
			A)	0.325 h
			B)	0.8125 h
			C)	0.0054 h
			D)	0.0135 h
9.			How many days is the half-life for exp154Er? Need a Hint?
			A)	0.062 d
			B)	0.0026 d
			C)	0.155 d
			D)	0.001 d
10.			How many hours is the half-life for exp147Er? Need a Hint?
			A)	0.104 d
			B)	0.042 d
			C)	0.00069 h
			D)	0.0017 d