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Periodic Table

October 7 th. Periodic Table. Protons, Neutrons, and Electrons. Atomic Number = protons & electrons Atomic Mass = protons + neutrons Calculate: Neutrons = Mass – Atomic Number STAAR Tips: APE (atomic number is the same as the amount of protons and electrons) M&M (mass in the middle).

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Periodic Table

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  1. October 7th Periodic Table

  2. Protons, Neutrons, and Electrons • Atomic Number = protons & electrons • Atomic Mass = protons + neutrons • Calculate: • Neutrons = Mass – Atomic Number STAAR Tips: • APE(atomic number is the same as the amount of protons and electrons) • M&M(mass in the middle)

  3. Groups & Periods • Groups (columns) • 18 groups • # of valence electrons • Skip groups 3-12 for now (transition metals) • Periods (rows) • 7 periods • # of energy orbitals for electrons

  4. Noble Gases • Non-metals • All gases at room temperature • All of their outer most energy levels have something in common • Discover during our upcoming lab! • EXTREMELY UNREACTIVE! MOST STABLE! • Remember: helium is used in birthday balloons

  5. Group 1 • This group is MOST REACTIVE • They have something in common in their outermost energy level

  6. Element classifications: Metals • Metals • Most abundant If you have an unknown element, how do you know you have a metal? Shiny Magnetic Good Conductor Malleable Ductile

  7. Element Classifications: Non-Metals • Non-Metals • Organic Elements (SPONCH) here: • Sulfur • Phosphorus • Oxygen • Nitrogen • Carbon • Hydrogen

  8. Non-metals Continued… If you have an unknown element, how do you know you have a non-metal? Dull Brittle Not a good conductor Not magnetic Not ductile Insulators

  9. Element Classifications: Metalloid • Metalloid • Least abundant • On the “stair case” If you have an unknown element, how do you know you have a metalloid? These have properties of BOTH metals and non-metals!

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