Problem 18P

(II) A typical atom has a diameter of about 1.0 X 10-10 (a) What is this in inches? (b) Approximately how many atoms are along a 1.0-cm line, assuming they just touch?

Solution 18P:

Step 1 of 2

The diameter of an atom is (d) = 1x10-10 m

Now 1 m = 39.37 in

Hence the diameter of an atom in inches is d =(1 x 10-10 m) x (39.37 in/m)

d = 3.937 x 10-9 in

d = 3.9 x 10-9 in (Since the least number of significant figure in diameter in meter is 2 so the

number of significant figure in diameter should be 2)