What is included in counting the electron domain around the central atom vsepr theory

Describe in detail the melting point behavior of the 80: 20 benzoic acid-mandelic acid mixture

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.)

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li