Slide 1 Electrons in Atoms Where are they? Slide 2 Energy Levels Orbits around the nucleus can also be called shells or energy levels. Slide 3 Diagram: (Fig. 13.3) The energy…

Slide 1 ChemistryChemistry Slide 2 Early Chemistry Dirt  Early Chemists only believed in 1 element: Dirt 4 elements  Later Chemists believed in 4 elements: Air Earth…

Slide 1 Remember to make corrections with a RED pen! Work quietly with your group! Slide 2 Helium has 2 protons (2+) & 2 electrons (2-), so charges cancel each other…

Slide 1 Atomic Models Plum Pudding Model (1900s) Lord Kelvin/JJ Thomson—no nucleus! Rutherford’s Model (early 1910s) Rutherford—atom has a nucleus! Rutherford was one…

Atomic Structure Chemistry: Chapter 4 Atoms Building block of matter Cannot be seen Known to exist through indirect evidence. Gathering information w/o actually seeing or…

Chemistry Early Chemistry Early Chemists only believed in 1 element: Dirt Later Chemists believed in 4 elements: Air Earth Fire Water Various combinations of these produced…

Ch. 1—Chemistry: An Introduction Electrons in Atoms Where are they? Energy Levels Orbits around the nucleus can also be called shells or energy levels. 2 Diagram: (Fig.…

The Nucleus contains positively charged Protons and neutral Neutrons; almost all of the Atomâs mass. The Nucleus The Electrons Negatively charged electrons, which are much…

Chemistry Early Chemistry Early Chemists only believed in 1 element: Dirt Later Chemists believed in 4 elements: Air Earth Fire Water Various combinations of these produced…