What is the energy of the photon emitted when an electron in a mercury atom drops from energy level f to energy level b? 1.

8.42 eV

2.

5.74 eV

3

3.06 eV

4.

2.68 eV

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.