Chapter 4 Atomic Structure Democritus Greek Philosopher First to suggest the idea of atoms. Believed atoms were indivisible & indestructible John Dalton English chemist…

Atomic Number Elements are different because they contain different numbers of protons. The atomic number of an element is the number of protons in the nucleus of an atom…

Chapter 5 Atomic Structure & the Periodic Table Sec 1: Atoms Democritus was the first to suggest the idea of atoms. The modern idea of the atom started with John Dalton.…

Chapter 4 Atomic Structure Democritus Greek Philosopher First to suggest the idea of atoms. Believed atoms were indivisible & indestructible John Dalton English chemist…

Unit 3: The Atom The Atom 1 Basic Atomic Theory Atom = âindivisibleâ in Greek Atoms are indivisible and indestructible Atoms of same element are identical Compounds are…