How small is an atom. Write down the calculation. The diameter of a US penny is 19 mm. The diameter of a silver atom, by comparison, is only 2.88 *10 -10mm.
How many silver atoms could be arranged side by side in a straight line at diameter of a penny (d penny)? 10 min

d penny =19mm I # Ag = d penny /d Ag atom I # Ag=19mm /2.88 *10 -10mm = 6.6*106 atoms
d Ag atom =2.88 *10 -10mm [ 6 600 000 atoms]
# Ag atoms--->? Atoms

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth