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CHAPTER 5 ORGANIZING THE ELEMENTS

CHAPTER 5 ORGANIZING THE ELEMENTS. Lavoiser (la vwah zee ay). French chemist Grouped known elements into 4 categories: -metals, nonmetals, gases and earths. Mendeleev. Mendeleev’s Periodic Table. Mendeleev ( Men duh LAY uff) 1860’s Modeled on solitaire

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CHAPTER 5 ORGANIZING THE ELEMENTS

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  1. CHAPTER 5ORGANIZING THE ELEMENTS

  2. Lavoiser (la vwah zee ay) • French chemist • Grouped known elements into 4 categories: -metals, nonmetals, gases and earths.

  3. Mendeleev

  4. Mendeleev’s PeriodicTable • Mendeleev ( Men duh LAY uff) • 1860’s • Modeled on solitaire • If elements lined up in order of increasing mass, a pattern emerged. • Elements with similar properties in same column

  5. Periodic • occurring or appearing at regular intervals or in regular cycles. newspapers, magazines, calendars

  6. Periodic Table • An arrangement of elements in columns, based on a set of properties that repeat from row to row.

  7. Mendeleev left spaces for undiscovered elements. • The accuracy of his predictions showed how useful his table could be.

  8. Modern Periodic Table • Elements arranged by increasing atomic number ( # of protons) instead of mass.

  9. - The horizontal rows are called periods, and are labeled from 1-7. - The vertical columns are called groups, and are labeled from 1-18.

  10. Elements in the same group have similar chemical an physical properties!! Why?? They have the same number of valence electrons. -highest occupied energy level of an atom. Groups (Columns)…Here’s Where the Periodic Table Gets Useful!

  11. Mendeleev’s PeriodicTable • Mendeleev ( Men duh LAY uff) • 1860’s • Modeled on solitaire • If elements lined up in order of increasing mass, a pattern emerged. • Elements with similar properties in same column

  12. Periodic

  13. Periodic Table

  14. Mendeleev left ______ for undiscovered _______. • The __________ of his predictions showed how useful his table could be.

  15. Modern Periodic Table • Elements arranged by ____________________ ( # of protons) instead of mass.

  16. - The horizontal rows are called ________, and are labeled from 1-7. - The vertical columns are called _______, and are labeled from 1-18.

  17. Elements in the same _____ have similar _______ and _________ properties!! Why?? They have the same number of _______________. -highest occupied energy level of an atom. Groups (Columns)…Here’s Where the Periodic Table Gets Useful!

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