What element is produced when Mercury - 204 undergoes alpha decay?

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.)

Light waves can move through , but they travel fastest when they move through a(n) .

In one or two grammatically correct sentences, write a definition for the term molecule geometry