What is the change that occurs when a substance changes from a gas to a liquid?

melting
boiling
evaporation
condensation< <

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.)

Type the letter that represents the correct location for each particle type below.

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!