solve each system of linear equations by substitution.
** Important note regarding lecture review questions: These questions are meant to act as a supplemental study aid. They will NOT be collected or graded. Your instructor reserves the right to ask exam questions relating to material covered in lecture or in assigned readings that may not be covered by the review questions. Topic #2: Chemistry 1. What is an atom What is an atom composed of What charge does each component have 2. What is an element What is an element composed of 3. What are the six most common elements found in living organisms 4. How do you calculate the number of protons an element contains The number of electrons 5. What is the atomic mass number equal to 6. What is an electron shell 7. When is an atom most stable 8. What are the three major types of chemi
