Question

the radius of a gold atom is 1.35 angstroms. how many gold atoms would it take to line up a span of 8.5 mm?

Answer 1

do you know how many angstroms are in one millimeter?

Answer 2

yes 10000000

Answer 3

so you can divide the 8.5 mm by that number and you will get how many angstroms you have in 8.5 mm.
then divide that number by 2 times the radio of one atom of gold and you will get the number of atoms that you can line up in 8.5 mm

Answer 4

ok thank you so much :)

Answer 5

sorry the first you have to multiply by 10000000

Answer 6

so you can multiply the 8.5 mm by that number and you will get how many angstroms you have in 8.5 mm.
then divide that number by 2 times the radio of one atom of gold and you will get the number of atoms that you can line up in 8.5 mm