Asubstance placed in a container has a fixed volume and takes up the shape of the container. in which state does this substance exist? plasma state solid state liquid state gaseous state

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A substance placed in a container has a fixed volume and takes up the shape of the container. In which state does this substance exist?
Liquid state is the state where this substance exist. Liquid doesn't have a fixed shape because there is more space between them. That is why they take the shape of the container.

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You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom. 

13) a 14) a15) b16) i don't know sorry17) a (maybe)