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Basics for understanding atoms

Basics for understanding atoms. Particle Review. Protons Positive charge Nucleus Neutrons No charge Nucleus Electrons Negative charge Surround nucleus in shells. What things mean on the Periodic Table. Atomic Number Number of protons in nucleus # of protons= # of electrons

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Basics for understanding atoms

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  1. Basics for understanding atoms

  2. Particle Review • Protons • Positive charge • Nucleus • Neutrons • No charge • Nucleus • Electrons • Negative charge • Surround nucleus in shells

  3. What things mean on the Periodic Table • Atomic Number • Number of protons in nucleus • # of protons= # of electrons • Examples: • Hydrogen = 1 • Oxygen = 8 • Lead = 82 • Aluminum = 13 • Atomic mass • Total number of protons and neutrons • Protons= atomic number • Neutrons: • Atomic mass – atomic number

  4. Sample problems • What is the atomic number for the following elements? • Sodium • Sulfur • Iron • Gold

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