Who has a higher ionization energy CI or Cs ?

An exothermic reaction is conducted in an insulated calorimeter filled with water. the calorimeter is then sealed so that there is no heat exchanged between the contents of the container and the surrounding air. which of the following statements is true about the reaction?

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

Place the following substances in order of ph from lowest ph to highest. a. neutral compounds, bases, acids b. acids, neutral compounds, bases c. bases, acids, neutral compounds d. bases, neutral compounds, acids