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Atoms, Molecules, And Matter

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Atoms and molecules
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Atoms, Molecules, And Matter

  1. 1. Physical Science Atoms, Molecules, and Matter
  2. 2. What is an Atom? <ul><li>An atom is the smallest particle of an element that has all the properties of that element. </li></ul><ul><li>Atoms are the building blocks of elements. </li></ul>
  3. 3. Structure of Atoms <ul><li>Nucleus – the nucleus contains neutrons (no charge) and protons (positive charge). </li></ul><ul><li>Electrons – tiny particles surrounding the nucleus (negative charge). </li></ul>
  4. 4. What is an element? <ul><li>An element is a substance that cannot be broken down any further. </li></ul><ul><li>They are the building blocks of matter. </li></ul><ul><li>Elements combine to make the world around us. </li></ul><ul><li>There are only a few elements found alone in nature: </li></ul><ul><ul><li>Ex: Silver and Gold </li></ul></ul>
  5. 6. What are molecules? <ul><li>Molecules are the smallest particles that can be divided without chemical change. </li></ul><ul><li>They are made of two or more atoms joined together, can be the same element or different elements. </li></ul><ul><li>A molecule of water is written H 2 O. This means there are 2 atoms of hydrogen and one atom of oxygen. </li></ul>
  6. 7. H H O
  7. 8. ATOMS Elements Molecules Matter H 2 O H H O

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