Which process is an example of an exothermic reaction?

An example of an exothermic reaction is Combustion (burning)

Deposition is the transition of matter going from gas to solid without passing through the liquid phase.a.) gas—-> solid

Order of filling levels and sublevels of electrons: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²3f¹⁴5d¹⁰6p⁶for an element with 5 electrons in the 3d energy level: full configuration: 1s²2s²2p⁶3s²3p³.