Chemistry 12-2-11 Atomic Number & Isotopes

CHEMISTRY: Can you believe atoms are that small – and the nucleus even waaaaaay smaller! Here’s another picture of atoms from the IBM Almaden Research Center. These are iron atoms on top of copper. Being able to move atoms around like this was a giant leap in the field of nanotechnology! (Sorry about that, bad pun! 🙂 ) Here’s the lecture from Friday on atomic number and isotopes. It’s the last lecture for this chapter – and for this year!!

What did you think about Lise Meitner’s story? Amazing, huh? How are you doing on writing nuclear symbols? Also make sure you can use them to determine the number of protons, neutrons, electrons, etc. And now you’ve finally got the formula for average atomic mass. Use it to do the problems tonight.

Did you get a copy of the Carbon Isotope Mini-Project? Holler if you have any questions? Have a great weekend!


Image source IBM Almaden Research Center

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27 thoughts on “Chemistry 12-2-11 Atomic Number & Isotopes

  1. Beh, kinda sad that I had to miss today. I wish I could’ve been here for a better understanding of the lesson. Though, I’m grateful
    For the vodcast. They’re very helpful and I’ll be sure to watch before class on Monday so I’m not so lost.

    • Garrett – Important question! Go back and check the purpose of the project. What does it say you are supposed to make?

  2. I will be at the help session tomorrow. I think it’ll be helpful to go over what we’ve learned the morning of the test.

  3. I’m pretty sure you can do it either way but does it matter if we put the short way of writing neutron or do you want us to write neutron out?

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