Do Now: Brain Teasers

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Do Now Brain Teasers

1. A woman from Washington married twenty different
   men from that city, yet she was not arrested for
   breaking the law. The most surprising fact is
   that she never divorced and none of these men
   died. How was this possible?
2. Can you guess the next three letters in the
   following series and why?C Y G T N T L I T
   F.........
3. What can you hold without ever touching or using
   your hands?

S, A, W . Each letter is the first letter of
every word in the Sentence.
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Compound Concept map Chapter 16 Vocabulary
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Science Spot Light

• Pressure Review

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Classroom Objective

• Title Elements, atoms, and compounds
• L.O. Students will understand what atoms,
  elements, and compounds are and how they are
  related. (Notes)

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Review

• State of Matter can be used to describe physical
  properties. For example, water can be a solid
  (ice) or a liquid (liquid water), or a gas
  (evaporation).

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Review

• A chemical property of iron is that it will
  slowly combine with oxygen in the air to form a
  different substance, rust.

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Elements

• What is an Element?
• An element is a pure substance that cannot be
  broken down into any other substances by chemical
  or physical means.
• Elements are the simplest substances.

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Atoms

• What is an Atom?
• An atom is the basic particle from which all
  elements are made.
• Atoms have a positive center (nucleus) surrounded
  by a negatively charged cloud.

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When Atoms Combine

• Atoms of most elements have the ability to
  combine with other atoms.
• Atoms combine to form larger particles called
  molecules - groups of two or more atoms held
  together by chemical bonds.
• A Chemical bond is a force of attraction between
  two atoms.

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Molecule Example

• For example think of the atoms hydrogen (H) and
  oxygen (O).
• Alone, the are colorless, odorless, gasses.
• When combined, they form a water molecule.

H
O
H2O
O
H
H
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Concept Maps
Element Oxygen O
Molecule Oxygen Molecule O2

Element Oxygen O
Atom
Negative electron cloud
Positive Nucleus
Atom
Negative electron cloud
Positive Nucleus
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Compounds

• Most elements in nature are found combined to
  other elements.
• A compound is a pure substance made of two or
  more different elements chemically combined in a
  set ratio.
• A compound may be represented by a chemical
  formula, which shows the elements in the compound
  and the ratio of atoms.
• For example H2O The ratio of hydrogen atoms to
  oxygen atoms is 2 to 1.

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Compounds

• When elements are chemically combined, they form
  compounds having properties that are different
  from those of the uncombined elements.
• For example
• Calcium (solid) Carbon (solid) Oxygen (gas)
• Calcium Carbonate

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Concept Maps
Compound Calcium Carbonate CaCO3
Element Ca

Element C
Element O3
Atom

Negative electron cloud
Positive Nucleus
Atom
Atom
Negative electron cloud
Negative electron cloud
Positive Nucleus
Positive Nucleus
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Video Snails

• Compounds

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In your notebook

• Concept Map Summary
• Draw a concept map that relates atoms, elements,
  and molecules (or compounds).
• Include the definitions for elements, atoms,
  molecules, and compounds.
• Include a picture sketch or description of your
  molecule (or compound)
• Example Calcium Carbonate