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The Three States Of Matter
Discovery of the Three States of Matter
No one really "Invented" the three states of matter. It would be better to start by acknowledging that scientific concepts are discovered rather than Invented, that said we can start delving into who discovered the three states of matter.
The discovery that there are 3 basic states matter starts with early philosophers noting there was a significance between solids and liquids , fast forward a thousand years and you have many scientists establishing the properties of matter and how theses define the state, pioneers in this field were Antonie Lavoisier, Henry Cavendish and Robert Boyle. These scientists conducted a lot of the early work involving the nature of gases and the chemical components of substances. The conclusions by the pioneers laid the foundation for the work of John Dalton who first proposed matter was made of atoms. Lord Kelvin, Donald Dewar went on to discover the very essence of what makes one form of matter a "state" of matter.
The theory is being build upon again and again by researchers all the time to the point that in modern times we have elucidated even more puzzling and obscure forms of matter from the Bose-Einstien condensate's to Plasma.
SOLID
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<a href="solid.cml"><font><img src="s.jpg" width="260" height="50">
</font></a><font><a href="liquid.cml"><img src="l.jpg" width="260" height="50">
</a><a href="gas.cml"><img src="g.jpg" width="260" height="50">
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Solid
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 Retains a fixed volume and shape. Rigid - particles locked into place.
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 Not easily compressible. Very little free space between particles.
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 Does not flow easily. Rigid - particles cannot move/slide past one
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<font size="5"><b>Intermolecular spaces between solid is</b> </font>
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