When is a particle classified as an atom a molecule or formula unit?

What mineral helps transport blood throughout the body? What organ works with the uterus? What are the living and non-living parts of a temperate rainforst biome? Which type of fault occurs when one portion of rock slides over the top of another? How does a gas change shape when it is poured from a small flask into a large flask? Explain why the term fluid mosaic model is used to describe the plasma membrane? How many year storms in mars? What is 2 mg of morphine equal to in ml? What 2 main nations want control of Jerusalem? What is the particle level of fried eggs? What is the si unit for amplitude? What is the solid dense center of our planet? What was Carlson's reaction to Lennie's death? How big is the alliston aquifer? What three organisms that might be killed if the farmer sprayed insecticide on them? What are the 3 families of arboviruses? How does one recognize redox reaction? What does shale turn into when its expossed to heat and pressure? What is the temperature of 9 moles of an ideal gas in a 35 liter container at 14 atm pressure-? What makes birds fly?