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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
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

Atomic Bonding

Williamsburg High School for Architecture and Design

Mr. Quinn and Ms. Tom

11/6/13

slide3
Aim
  • How are compounds and elements different?
what are some chemicals you have used
What are some chemicals you have used?
  • You can’t find most of these on the periodic table!
  • They are compounds
compound vs element
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
properties
Properties
  • Elements and compounds have different physical properties
    • Melting point, boiling point, etc.
  • Elements and compounds have different chemical properties
    • Reactivity, solubility, etc.
types of compounds
Types of Compounds
  • Salt: a metal and a nonmetal combined
  • Molecule: two or more nonmetals combined
compounds in architecture
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!
compounds in architecture1
Compounds in Architecture
  • Iron and oxygen combine to form iron oxide
    • More commonly known as rust!
how can we recognize compounds vs elements
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
practice round 1
Practice, Round 1
  • Which of the following is a compound?
  • Na
  • C
  • H2O
  • Xe
practice round 2
Practice, Round 2
  • Organize the following compounds into “salt” or “molecule”
  • H2O
  • NaCl
  • CaO
  • CH4
  • H2SO4
  • KBr