3. where do you find the elements with the least atomic size, greatest electronegativity, and greatest ionization energy in the periodic table?

In 2002, the rare earth elements mine in mountain pass, california was closed because

State one important difference between a physical change and a chemical change?

You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices