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Electron Configurations and The Periodic Table

5.2. Electron Configurations and The Periodic Table. Groups of the Periodic Table. Groups – share similar properties Periods – similar e- configs Group 1 – Alkali Metals – ns 1 Most reactive metals Silvery soft metal Must be stored under oil or kerosene b/c so reactive with water.

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Electron Configurations and The Periodic Table

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  1. 5.2 Electron Configurations and The Periodic Table

  2. Groups of the Periodic Table • Groups – share similar properties • Periods – similar e- configs • Group 1 – Alkali Metals – ns1 • Most reactive metals • Silvery soft metal • Must be stored under oil or kerosene b/c so reactive with water

  3. Groups of the Periodic Table • Group 2 – Alkaline-Earth Metals – ns2 • Harder, denser and stronger than gr. 1 • Less reactive than gr. 1 • Higher melting points than gr. 1 • Hydrogen – group of it’s own • Properties are not like gr. 1

  4. Groups of the Periodic Table • Transition Elements – d block elements • Irregularities in some e-configs • Good conductors of electricity • High luster, less reactive than gr. 1 & 2

  5. Main Group Elements • MGE – s and p blocks • For p block, properties differ greatly – some metals, metalloids, and some nonmetals • Group 17 – Halogens-ns2 and np5 • Most reactive nonmetal • React with Gr. 1 & 2 to form salts

  6. F block • Lanthanides – Ce to Lu • Reactivity similar to Gr. 2 • Actinides – Th to Lr • All radioactive

  7. Review • Please complete the section review on page 149 and do numbers 1-6 for homework 

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