This element is often used to block out dangerous radiation.
a. lead
b. carbon-12
c. uranium-236
d. uranium-238

Let the ed50 of a recreational drug be defined as the amount required for 50% of a test group to feel high or get a buzz. if the ed50 value of ethanol is 470 mg/kg body mass, what dose would a 70 kg party goer need to quickly consume in order to have a 50% chance of getting a buzz? 235 mg 470 mg 32,900 mg 35,000,000 mg

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2

Which compound most likely has the greatest bond energy?