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Using the Bohr Model to Build an Atom

Using the Bohr Model to Build an Atom. Remember what the periodic table gives you…. # of p + Or # of e -. Atomic Number. 7. =. N. Chemical Symbol. 14.007. Atomic Mass. =. (# of n 0 ) + (# of p + ). Number of Neutrons?. You’ll need to do a little calculation… Remember that:

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Using the Bohr Model to Build an Atom

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  1. Using the Bohr Model to Build an Atom

  2. Remember what the periodic table gives you… # of p+ Or # of e- Atomic Number 7 = N Chemical Symbol 14.007 Atomic Mass = (# of n0) + (# of p+)

  3. Number of Neutrons? • You’ll need to do a little calculation… • Remember that: • Atomic number = p+ • Atomic mass = (p+) + (n0) • So to calculate # of n0… • [(p+) + (n0)] – (p+) = • Atomic mass – Atomic Number = # of neutrons n0

  4. Let’s Build an Atom… 2 = p+ He 4.0026 = n0 = e- Step 1: Build the Nucleus – insert protons. Step 2: Build the Nucleus – insert neutrons. Step 3: Construct the first orbital and fill it with up to 2 electrons.

  5. Let’s Build a Bigger Atom… 5 B 10.811 Step 1: Build the Nucleus – insert protons. Step 2: Build the Nucleus – insert neutrons. Step 3: Construct the first orbital and fill it with up to 2 electrons. Step 4: Construct the second orbital and fill it with up to 8 electrons.

  6. How Can We Do This On Paper? 15 P 30.974 15p+ 2e- 8e- 5e- 16n0 Step 1: Build the Nucleus – insert protons. Step 2: Build the Nucleus – insert neutrons. Step 3: Construct the first orbital and fill it with up to 2 electrons. Step 4: Construct the second orbital and fill it with up to 8 electrons. Step 5: Construct the third orbital and fill it with up to 8 electrons.

  7. One More Time!! 12 Mg 24.305 12p+ 2e- 8e- 2e- 12n0 Step 1: Build the Nucleus – insert protons. Step 2: Build the Nucleus – insert neutrons. Step 3: Construct the first orbital and fill it with up to 2 electrons. Step 4: Construct the second orbital and fill it with up to 8 electrons. Step 5: Construct the third orbital and fill it with up to 8 electrons.

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