) Iodine-125 emits gamma rays and has a half life of 60 days. If a 20 mg pellet of iodine-125 is implanted into a prostate gland, how much I-125 remains after 1 year

The electromagnetic force acts between what

Which compound contain an iron with a 3+ charge

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm