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Science Peoplez

Nuff said...

What did Democritus do? Said all matter is made up of tiny indivisible particles (but thought particles were mini-versions of the object) Called them "atomos"- cannot be divided- but main problem was how they were stuck together.
What did Aristotle do? Said all matter made up of "elements"- hot, cold, wet and dry. Suggested altering ratio of "elements" changes the substance's identity, which suggests alchemy.
What did Boyle do? Published a pamphlet called "The Skeptic Chymist" (coined the term) stated a substance is NOT an element if it has 2 or more components.
What did Lavoisier do? Expanded Boyle's work and said that "an element has one component and a compound has more than one element." Later: found the LAW OF CONSERVATION OF MASS- total mass in a system does not change.
What did Priestly do? Isolated a gas (OXYGEN) that made fire burn brighter and coal hotter. Confirmed element- when put through water, made an acid.
What did Lavendish do? Isolated a gas (HYDROGEN) that if ignited in air formed water and heat.
What did Proust do? Noticed when water is formed from oxygen and hydrogen it is always in a ratio of 8O:1H. LAW OF DEFINITE COMPOSITION: all samples of a compound contain the same elements in the same ratio.
What did Dalton do? Published "Atomic Theory of Matter", with 5 (?) main principles.
What is the Atomic Theory of Matter? 1) Everything's made of small particles called atoms. 2) Atoms can't be subdivided, created or destroyed. 3) All atoms of an element are identical in SMP. 4) Atoms react with each other in whole # ratios. 5) Atoms of different elements have different
What does SMP stand for? Size, mass and properties.
Created by: grotle_grovyle