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The Bohr Model of the Atom

The Bohr Model of the Atom. Topic #6. EQ. How can you identify an element based on the number of electrons and valence electrons?. What do we know?. Atoms have 2 main parts Electron cloud -- contains electrons Nucleus – contains protons and neutrons Electrons = e- Protons = p+

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The Bohr Model of the Atom

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  1. The Bohr Model of the Atom Topic #6

  2. EQ How can you identify an element based on the number of electrons and valence electrons?

  3. What do we know? • Atoms have 2 main parts Electron cloud -- contains electrons Nucleus – contains protons and neutrons Electrons = e- Protons = p+ Neutrons = n0

  4. What do you need to know? • There are 7 possible orbitals • You can determine how many orbitals your model has by looking at what period (row) the element is on • The orbitals hold a specific number of electrons (which is the same as the atomic number)

  5. How many electrons per orbital? Period 1  orbital (ring) 1: 2 e- Period 2  orbital (ring) 1: 2 e- orbital (ring) 2: 8 e- Period 3  orbital (ring) 1: 2 e- orbital (ring) 2: 8 e- orbital (ring) 3: 8 e- Period 4  orbital (ring) 1: 2 e- orbital (ring) 2: 8 e- orbital (ring) 3: 18 e- orbital (ring) 4: 8 e-

  6. Information to create a Bohr model • Element name and symbol: Magnesium (Mg) • Atomic number: 12 • Mass number: 24 • Protons: 12 • Electrons: 12 • Neutrons: (24 - 12) = 12

  7. Bohr model for Mg 12p+ 12n

  8. Bohr model for Al 13p+ 14n0

  9. Draw the following Bohr models and Lewis Dot Structures Boron Carbon Nitrogen Oxygen Fluorine AluminumSilicon Phosphorus Sulfur Chlorine

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