link to Phet chemistry simulation

on a sheet of paper, answer the below questions, include the names of group members and identify the recorder.

topic(s): isotopes & average atomic mass

questions [14 points; 2 points / question]

isotope module

open symbol & abundance 'boxes'

1. add neutrons to ___ and record: symbol, stable / unstable isotope, abundance, mass #, and atomic mass - in the form of a table.

a. H

b. C

c. Ne

2. based on the preceding table, what's the relationship between the mass # and atomic mass ?

mixture module

select: isotope mixture / my mix

3. while adding variable amounts of Li isotopes to the sample, record the corresponding average atomic mass and the number of each type of the Li isotopes - in the form of a table. qualitatively, describe the relationship / pattern in your data.

4. while adding variable amounts of Ar isotopes to the sample, record the corresponding average atomic mass and the number of each type of the Ar isotopes - in the form of a table. qualitatively, describe the relationship / pattern in your data.

select: isotope mixture / nature's mix

5. select __; record average atomic mass & percent composition (in a sample of that atom)

a. Li

b. Mg

c. Ar

based on the preceding information and your prior assignment, what is the relationship between the average atomic mass & percent composition.

6. in regards to NGSS science & engineering practices, select one high school standard (identify your selection) and which aspect of this activity meets this standard; elaborate.

7. in regards to NGSS science & engineering practices, select one high school standard (identify your selection) and which aspect of this activity meets this standard; elaborate.