Know how to use "fewer" and "less"? Find out.
any of numerous organic derivatives of magnesium (Mg) commonly represented by the general formula RMgX (in which R is a hydrocarbon radical: CH3, C2H5, C6H5, etc.; and X is a halogen atom, usually chlorine, bromine, or iodine). They are called Grignard reagents after their discoverer, French chemist Victor Grignard, who was a corecipient of the 1912 Nobel Prize for Chemistry for this work