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Notes D 1.3

Notes D 1.3. The periodic table is a map of the elements. The periodic table has distinct regions. Position of an element on the PT reveals something about how reactive the element is. Elements in Groups 1 and 17 are especially reactive. Group 18 (the Noble Gases) are least reactive.

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Notes D 1.3

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  1. Notes D 1.3 The periodic table is a map of the elements.

  2. The periodic table has distinct regions. • Position of an element on the PT reveals something about how reactive the element is. • Elements in Groups 1 and 17 are especially reactive. • Group 18 (the Noble Gases) are least reactive.

  3. Most elements are metals. • Usually shiny • Often conduct electricity and heat well • Can be easily shaped and drawn into wire

  4. Groups of Metals • Alkali metalsand alkaline earth metals –at left of the PT and very reactive • Transition metals—near the center of the PT and include copper, gold, silver, and iron • Rare earth metals– in the top row of the 2 rows of metals show outside the main body of the PT • Two bottom rows—separated from the table to save space.

  5. Nonmetals and metalloids have a wide range of properties. • Nonmetals—on right side of PT and include elements with a wide range of properties: carbon, nitrogen, sulfur, also the Halogens such as chlorine and the noble gases such as neon • Metalloids—in between metals and nonmetals in the PT—have characteristics of both. Important in the making of semiconductors for electronic devices

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