Josh, Shannon, Brodey



Democritus- He called an uncutable particle an atom
Believed atoms were always in motion
Believed matter was imperishable.

Dalton- Elements combine based on mass to form different compounds
Hydrogen + Oxygen = Water
Elements combine in specific proportions because they are made up of individual atoms
Five main points of Dalton's Atomic Theory
  • Elements are made of tiny particles called atoms.
  • All atoms of a given element are identical.
  • The atoms of a given element are different from those of any other element; the atoms of different elements can be distinguished from one another by their respective relative weights.
  • Atoms of one element can combine with atoms of other elements to form compounds; a given compound always has the same relative numbers of types of atoms.
  • Atoms cannot be created, divided into smaller particles, nor destroyed in the chemical process; a chemical reaction simply changes the way atoms are grouped together.

Thomson-











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