The complete orbital notation diagram of an atom is shown. Seven squares are shown aligned horizontally. Inside the first square from the left is shown one upwards pointing arrow and one downwards pointing arrow. In the second, third, fourth, fifth, and sixth squares is a pair each of upwards and downwards pointing arrows. The seventh square has a single upwards pointing arrow.

Based on the diagram, what values can be assigned to the principal quantum number for the electrons in the atom? What information does this quantum number provide about the location of the electron?

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.