In-class Exercise 1 Name ________________________________
Student ID ________________________________
Submit for credit by uploading your work to the Assignments section of myCourselink no later
than midnight on Sept. 11, 2020. For participation credit your work must demonstrate a
reasonable attempt at the following questions!
1. Approximately 92% of the natural abundance of silicon is stable with mass number of 28.
a) What is the atomic symbol for silicon?
b) How many protons are found in the nucleus of silicon?
c) How many neutrons are found in the nuclei of this isotope?
2. Consider an element X:
74
X
32
a) What is element X?
b) How many neutrons are found in the nucleus of this isotope?