Physical Science project

My physical science project was  called a Bohr Atom project. It took up majority of my sleep and my everyday life. The atom that I got was called Lead and the symbol is Pb. When I found out that the atoms atomic number was only 82 I thought that I only needed 82 protons, neutrons and electrons. Turns out that in order to get the correct number of protons and neutrons and electrons is to take the mass, which was 207.2, and subtract it from the atomic number. Thankfully my protons and electrons were the same amout as my atomic number but my neutrons were 125 by which consumed much of my time. I honestly thought that my project was going to be easy as pie...no it is not! There were so many requirments that had to be met and if it did not meet then I got points taken off ! Then in order for me to get my electrons on the right shell I had to follow a rule called 2,8,8,18,18,32,32. My electron shells went 2;8;18;18;32;4. The reason why I had only four on the last shell is because that is how many valence electrons I had left over. All in all this project was worth while because it taught me a lot about what I did not know about the atom lead.