The radius of a lead atom is 175pm. How many lead atoms would have to be laid side by side to span a distance of 4.70 mm? atoms The mass of a single uranium atom is 4.701022 grams. How many uranium atoms would there be in 94.7 milligrams of uranium? atoms 9 more group attempts remaining The volume of a single iridium atom is 1.041023cm3. What is the volume of a iridium atom in microliters? L 9 more group attempts remaining