link to Chemistry gateway, which contain links to videos about various chemistry concepts - you'll have to find the relevant specific link(s) to do this assignment.

on a sheet of paper, (i) answer the below questions based on your textbook and the above video link, (ii) include textbook page number(s) and url of the website (or sequence of links starting from the above link), where you found the answer, and (iii) include the names of all group members and identify the recorder.

topic(s): isotopes & ions

questions [14 points]

1. what is an isotope ? [1 point]

2. what is average atomic mass ? include a formula and define the terms in the formula. [1 point]

3. how is an ion & atom the same ? different ? [1 point]

4. based on the preceding information, fill-in the below table in regards to various (hypothetical ?) ions. [11 points]

symbol # protons # neutrons # electrons mass number charge
23Na +          
  24 25     +2
      8 17 -2