Lesson 04 ­ Bohr­Rutherford Diagrams kw.notebook
Date: ____________________
Bohr­Rutherford Diagrams
One way to represent an element that can be very useful is to use diagrams. Bohr­Rutherford Diagrams show the number of neutrons
_________________ and __________________ in the nucleus and the protons
number of _________________ that orbit that nucleus for each element.
electrons
Bohr­ Rutherford Diagrams get their name from two scientists who contributed to our current model of the atom.
Rutherford
Rutherford conducted experiments and found that the nucleus contained all positive
of the _________________ charge in the atom.
He found this out by shooting positive alpha particles at gold foil
________________________. When some of the particles _____________________ back he knew that the part of the atom they had bounced
hit must be ______________________ causing them to repel.
positive
negative
negative
Bohr
Bohr built upon Rutherford's ideas by conducting experiments to learn about the _______________ in the atom that surround the nucleus.
electrons
levels
What he found was that the electrons are located in _________________ surrounding the nucleus.
protons
neutrons
Lesson 04 ­ Bohr­Rutherford Diagrams kw.notebook
Lesson 04 ­ Bohr­Rutherford Diagrams kw.notebook
How to Draw Bohr­Rutherford Diagrams
Step
1) Draw a circle to represent the nucleus
of the atom.
2) Write the number of protons in the
nucleus.
3) Write the number of neutrons in the
nucleus.
4) Draw circles around the nucleus to
represent the energy levels.
5) Fill the shells with electrons.
1st shell can hold 2 e
2nd shell can hold 8 e
3rd shell can hold 8 e
4th shell can hold 2 e
6) Pair up e in the 2nd and 3rd shells
after 4e have been placed.
Example Fluorine
Lesson 04 ­ Bohr­Rutherford Diagrams kw.notebook
Bohr Rutherford Diagrams for the First 20 Elements
The outermost ring of electrons is called the __________________________
Lesson 04 ­ Bohr­Rutherford Diagrams kw.notebook
Lesson 04 ­ Bohr­Rutherford Diagrams kw.notebook
EXIT CARD
EXIT CARD
Draw the Bohr Rutherford
model for Na
Draw the Bohr Rutherford
model for Na
EXIT CARD
EXIT CARD
Draw the Bohr Rutherford
model for Na
Draw the Bohr Rutherford
model for Na
Lesson 04 ­ Bohr­Rutherford Diagrams kw.notebook
Sodium
Lesson 04 ­ Bohr­Rutherford Diagrams kw.notebook