What is the electron configuration of cobalt?

Which of the following electromagnetic waves can create ions?

4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?