What happened to the ionization energy of hydrogen"H" when its electron affinity​

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Identify the electromagnets with poles that are reversed from the electromagnet shown above

What best discribes the relationship between wavelength and frequency in a electromagnetic wave