Nuclei are hard core!

First of all, we took a quiz over the history and structure of the atom.  Watch this Crash Course Chemistry to get a review.

This week we started with some practice on calculating neutrons. We did some reading from the text in class, then covered these slides:

Remember these basic rules:

  • the Protons ( = Atomic Number) are the identity of the element and also the number of electrons
  • Mass Number is for a given isotope (usually we just round the atomic mass from the table)
  • Protons + Neutrons = mass number
    • Soo ¬†Mass# – Protons = # of Neutrons

We will end the week reading the first 3 pages of our new text. (314-316)