Early Models of the Atom –An atom is the smallest particle of an element that retains its identity in a chemical reaction. –Philosophers and scientists.
© Copyright Pearson Prentice Hall Slide 1 of 18 Tuesday!!!!! 10/18/11 Bell Ringer 1. Pick up your papers from the corner desk. 2. Get out paper to take.
Slide 1 of 18 Chemistry 4.1. Slide 2 of 18 © Copyright Pearson Prentice Hall Defining the Atom > Early Models of the Atom An atom is the smallest particle.
Atomic Structure and the Periodic Table Early Models of the Atom Dalton’s Atomic Theory - All elements are composed of atoms - All elements are composed.
Atomic Structure History of Atomic Theory. Democritus (460 - 370 BC) Was the first person to come up with the idea of atom Believed that all matter was.
