During this week and last week's class we spent a good bit of time with the periodic table and reviewed protons, neutrons and electrons. The next few weeks we will be diving quite deeply into the periodic table and the language of atoms and molecules.
For homework this week:
Do the enclosed worksheet. I've included the answer key so that you can check your work. Beware, there are some isotopes and ions on the sheet so pay close attention. This may be a little tricky so take your time on this. I want you to fill out all the blank spaces on the table. Let me walk you through the first one. On the first line, notice that the letter B is on the right hand side. That is the atomic symbol for Boron so look up Boron in your periodic table. Once you've found it, fill in the blanks. For example, atomic number would be 5, protons would be 5, Electrons are 5 and Atomic mass is 5 + 6 so 11. Since some of these are isotopes you want to make sure you add protons and neutrons to get the atomic mass. Also, if you need to find the number of neutrons, be sure to use the atomic mass on the worksheet to find them. It may be a sneaky, sneaky isotope. For the second one, they don't give you the symbol but they do give you the atomic number so you can go from there. Last but not least, look at the 5th one. It says Fe+3. That means it's a positive ion of iron so how many electrons should it have. Be sure to check your answers on this. Please email me if you're confused.
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