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)