Consider two atoms: one red and the other blue. There are six locations to place those two atoms. You can only have one atom in each location. How many microstates exist for this system?

A. 15
B. 30
C. 36
D. 12
E. None of the above


A. Incorrect. You made a mistake in calculation. Try again.
B. Correct. If atom (1) is in the first location, atom (2) can be in each of the free locations. This gives 5 possibilities for each of the 6 locations for atom (1).
C. Incorrect. You cannot just raise one number to the other. Try drawing six boxes and putting the two atoms (1) and (2) in as many different locations as possible. Be systematic.
D. Incorrect. You cannot just multiply the number of locations by the number of atoms. Try drawing six boxes and putting the two atoms (1) and (2) in as many different locations as possible. Be systematic.
E. Incorrect. One of these is the correct number of microstates.

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