9/21-24 History of the Atom 13 ▲ Warm up:

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Presentation transcript:

9/21-24 History of the Atom 13 ▲ Warm up: Identify the highest ionization energy highest electronegativity largest atomic radius for the following: Br-Ar O-F Cs-Ba

Atomic Theory Timeline

Modern Theory of the Atom • Electrons (- charged)-found outside the nucleus in orbitals • Protons (+ charged)-found inside the nucleus • Neutrons (o charge)-found inside the nucleus

Relative size Nucleus extremely small compared to rest of atom …..although the nucleus contains most of the mass

Connection to Periodic Table

9/24 Periodic Table Design 14 ⭐