1. The ancient Greek philosopher Democritus coined what word for a tiny piece of matter that cannot be divided? a) Element b) Electron c) Atom d) Molecule.
Whole lesson ppt
Section 1: Introduction to Atoms. A.) What does all matter consist of? B.) How many elements are there? C.)What are elements made of? D.)What.
Atomic # # of protons in an atom Never changes for a given element Therefore, used to always identify the element.
The Structure of the Atom
