Presentation on theme: "Chapter 4.1 Atomic Theory. Atom Smallest particle of an element that has all the properties of that element Atomic theory is the study of the nature of."— Presentation transcript:
Atom Smallest particle of an element that has all the properties of that element Atomic theory is the study of the nature of atoms and how atoms combine to form all types of matter.
Atomic Theory Subatomic particles come together to form atoms Particles: 1. Protons – positive particles in the nucleus -charge is +1 -# protons = atomic # 2. Electrons – negative particles on orbits around the nucleus -charge is -1 -# electons = # protons= atomic # 3. Neutrons – neutral particles in the nucleus -charge is 0 -#neutrons= mass-atomic #
Structure of the Atom Electron orbit Valence shell Proton Neutron Electron
Bohr-Rutherford Diagrams Rules: 1. Calculate PEN 2. Write the number of protons and neutrons in the nucleus with the elemental symbol 3. Draw the number of electrons on orbits (2 on the first, 8 on the second, 8 on the third, unlimited on the fourth)