What is the correct formula for an ionic bond between Ca and S?
Cas
Cas
Cazs
Ca, S2

Which best describes why nh4+ can form an ionic bond with ci-?

Based on the equation and the information in the table, what is the enthalpy of 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