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Do Now

Do Now. Which list of elements consists of a metal, a metalloid, and a nonmetal? Li, Na, Rb Cr , Mo, W Sn , Si, C O , S, Te. The elements in Group 2 are classified as Metals Metalloids Nonmetals noble gases. Atomic Bonding. Williamsburg High School for Architecture and Design

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Do Now

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  1. Do Now • Which list of elements consists of a metal, a metalloid, and a nonmetal? • Li, Na, Rb • Cr, Mo, W • Sn, Si, C • O, S, Te • The elements in Group 2 are classified as • Metals • Metalloids • Nonmetals • noble gases

  2. Atomic Bonding Williamsburg High School for Architecture and Design Mr. Quinn and Ms. Tom 11/6/13

  3. Aim • How are compounds and elements different?

  4. What are some chemicals you have used? • You can’t find most of these on the periodic table! • They are compounds

  5. Compound vs. Element • An element is a pure form of an atom (and nothing else) • A compound is a pure substance made of 2 or more elements

  6. Properties • Elements and compounds have different physical properties • Melting point, boiling point, etc. • Elements and compounds have different chemical properties • Reactivity, solubility, etc.

  7. Types of Compounds • Salt: a metal and a nonmetal combined • Molecule: two or more nonmetals combined

  8. Examples

  9. Examples

  10. Examples

  11. Examples

  12. Compounds in Architecture • The Statue of Liberty is made of copper • Over time, various compounds have built up, turning it green • These compounds also protect it!

  13. Compounds in Architecture • Iron and oxygen combine to form iron oxide • More commonly known as rust!

  14. Why do you think compounds have different properties from elements?

  15. How can we recognize compounds vs. elements? • For elements we write the atomic symbol • Al, Fe, C, F, Ne • For compounds, the symbol and number of all elements are written • Water is… • H2O • Sugar is… • C6H12O6 • Salt is… • NaCl

  16. Practice, Round 1 • Which of the following is a compound? • Na • C • H2O • Xe

  17. Practice, Round 2 • Organize the following compounds into “salt” or “molecule” • H2O • NaCl • CaO • CH4 • H2SO4 • KBr

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