Homework

CHEM& 140 – Checkpoint 6 – Show It HW Name ________________________________ Section ___

1. What is an ion? What is an anion? What is a cation? Provide examples.

2. What are isotopes? Provide a definition.

3. What are percent natural abundances? Provide a definition.

4. Go to ptable.com and click on the isotope tab. Choose an element and report out the element’s stable (not radioactive) isotopes and their percent natural abundances.

5. What is the atomic mass of an element? And how is this very different than atomic number and mass number?

6. When an atom of an element forms an ion, which particles are gained or lost: protons, neutrons, or electrons? Explain how gaining or losing the other two types of particles from an atom results in something different than ion formation.

7. Do Question #3 on page 50 of the Workbook and insert a photo of your work.

8. Do page 55 of the Workbook and insert a photo of your work.

Before attempting the next two calculation problems, refer to Example 4.9 on page 119 in the textbook or Dr. G’s class notes. Since these next two problems have answers in the Workbook, you need to Show Your Work by including the equation (calculation set-up), similar to where the solution to the Example 4.9 has “atomic mas = …”.

9. Do Question #3 on page 56 in the Workbook and insert a photo of your work.

10. Do Question #4 on page 56 in the Workbook and insert a photo of your work.