To categorize the elements, what reactions did mendeleev observe?

reactions of elements with helium and lithium

reactions of elements with boron and beryllium

reactions of elements with nitrogen and carbon

reactions of elements with oxygen and hydrogen

What are the chemical names of these compounds? ke: mg3n2: reset next

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

What type of organic molecule comprises the majority of a potato?