Unit 3

Unit 3

1. Lesson 1

   • Atom
     • The smallest particle that a particle can be divided into and still be that element.
     • You can't see individual atoms
   • Scientists that changed the atomic theory
     • John Dalton
       • - 1st modern theory - All elements are composed of atoms that are invisible and indestructable - Atoms of same element are all the same, but different from other element's atoms - Elements of different elements have different masses - Every substance is made up of atoms combined in certain ways
     • J.J. Thomson
       • - Atoms are made up of even smaller partcicles