Organisms contain different levels of organization within their bodies. Arachnoidiscus ehrenbergi, pictured below, is a single-celled organism that is part of the group of algae known as diatoms.

1.from liquid state to gaseous state is evaporation 3.solid to liquid is melting 5. solid to gaseous state is sublimation 6. gas to solid state is decomposition 7. a change of state is known as the states of matters

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.