1. 3rd Nine Weeks Assessment Review
Answers

2. 1. Locate Boron on your periodic table
1. Locate Boron on your periodic table. What is the atomic number: _____5_____, the atomic mass: _____10.81__________. How many protons does it have? _____5_________, Neutrons _______6___________, Electrons ______5________. 2. Locate Phosphorus on your periodic table. What is the atomic number: ____15______, the atomic mass: ___30.974__________. How many protons does it have? ______15______, Neutrons _______16___________, Electrons _______15_______. 3. The elements in each group have the same number of __valence_____ __electrons______.

3. 4. Group 1 has ___1_____ valence electron and bonds with group ____17____. 5. Group 2 has ___2_____ valence electrons and bonds with group ____16____. 6. Group 13 has ___3_____ valence electrons and bonds with group ____15____. 7. Group 14 has ___4____ valence electrons and bonds with group ___14____.

4. 8. Group 15 has ___5____ valence electrons and bonds with group ___13_____.