Question

We are learning about the Crystalline state and its models. The question says Use diameters of 17, 19, 21, and 24 nm for a dime, penny, nickel, and quarter, respectively, to calculate r+/r– for the...

various “coin ion” combinations, assuming the dime to be the cation. With actual coins, determine the number of anions that can touch the dime with each combination. I really don't know where to start