3. (02.06 MC) The table compares some characteristics of two atoms.
Charged Particles
Atom Number of Neutrons Mass Number
X
10
19
Y
8
16
Use the table to determine the number of protons for each atom. Then, choose the statement below that is true about
the two atoms. (5 points)
Atom X and Atom Y are isotopes.
Atom X and Atom Y are in the same family.
Atom X is in a row below Atom y on the periodic table.
O Atom X is in a column to the right of Atom y on the periodic table.

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.

What are the three major branches of natural science? • earth and space science, life science, physical science •earth and space science, physical science, chemistry •physical science, life science, chemistry •life science, chemistry, physics

Drug abuse will not lead to physical and psychological dependence. true or false ?