How to-bohr-diagram[1]

1. Periodic Table Study Guide www.middleschoolscience.com 2008 How to Draw Bohr Diagrams

2. Bohr Diagrams Find your element on the periodic table. Determine the number of electrons – it is the same as the atomic number. This is how many electrons you will draw.

3. Bohr Diagrams Find out which period (row) your element is in. Elements in the 1 st period have one energy level. Elements in the 2 nd period have two energy levels, and so on. www.chem4kids.com

4. Bohr Diagrams C Draw a nucleus with the element symbol inside. Carbon is in the 2 nd period, so it has two energy levels, or shells. Draw the shells around the nucleus.

5. Bohr Diagrams Add the electrons. Carbon has 6 electrons. The first shell can only hold 2 electrons. C

6. Bohr Diagrams Since you have 2 electrons already drawn, you need to add 4 more. These go in the 2 nd shell. Add one at a time -starting on the right side and going counter clock-wise. C

7. Bohr Diagrams Check your work. You should have 6 total electrons for Carbon. Only two electrons can fit in the 1 st shell. The 2 nd shell can hold up to 8 electrons. The 3 rd shell can hold 18, but the elements in the first few periods only use 8 electrons. C

8. Bohr Diagrams Try the following elements on your own: H He O Al Ne K C

9. Bohr Diagrams Try the following elements on your own: H – 1 electron He O Al Ne K H

10. Bohr Diagrams Try the following elements on your own: H He - 2 electrons O Al Ne K He

11. Bohr Diagrams Try the following elements on your own: H He O - 8 electrons Al Ne K O

12. Bohr Diagrams Try the following elements on your own: H He O Al - 13 electrons Ne K Al

13. Bohr Diagrams Try the following elements on your own: H He O Al Ne - 10 electrons K Ne

14. Bohr Diagrams Try the following elements on your own: H He O Al Ne K - 19 electrons K

15. Bohr Diagrams End of Study Guide. You should know how to draw a Bohr Diagram for the first 20 elements.