What letters go to which word

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

Heat is the total potential energy of a substance that can be transferred. true false

Which subshell is represented by the actinides family?