Most of an atom's volume is the space in which electrons move true or false

If soap hits the floor, is the soap dirty or the floor

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 characteristics can be used to differentiate star systems? check all that apply.