1. 1. In the becoming a cation, an atom A. loses electrons B. gains electrons C. shares electrons D. No correct answer given 2. In becoming an anion, an atom A. loses electrons B. gains electrons C. shares electrons D. No correct answer given

2. 3. Which atom has four valence electrons? A. Be B. Fe C. Ge D. Te 4. Which atom does not have the same number of valence electrons as the other atoms given? A. O B. N C. S D. Se

3. 5. Which has the largest radius? A. Cl - B. Cl C. Na + D. Na 6. In which pair does the ion have a larger radius than the atom? A. Na and Na + B. Br and Br - C. Al and Al 3+ D. H and H +

4. 7. When a magnesium atom changes to a magnesium ion, its radius A. increases B. decreases C. remains the same D. insufficient data to answer 8. When an atom loses two electrons it becomes an ion with a charge of A. 0 B. +2 C. -2 D. +4

5. 9. During the formation of an ionic bond, the atom which transfers its valence electron(s) to another atom is the atom with the A. higher electronegativity B. lower electronegativity C. higher ionization energy D. No correct answer given

6. 10. The metal 45 21 Sc loses three electrons to form an ion. The ion has the formula A. Sc 3+ B. Sc 3- C. Sc 4- D. Sc 4+ 11. Which of the following does not have a noble gas electron structure? A. S 2- B. Ar C. Al 3+ D. Sb 5+

7. 12.Which element react with the halogens forming compounds containing a ratio of 1 halogen atom to 1 atom of the other element A. Alkali metals B. Alkaline earth metal C. Metalloids D. Noble gases E. None of the above

8. 13. The formula of the compound formed in the reaction between lithium and sulfur is A. LiS B. LiS 2 C. Li 2 S 3 D. Li 2 S

9. 14. The formula of the compound formed in the reaction between barium and oxygen is A. BaO B. Ba 2 O C. BaO 2 D. Ba 2 O 3

10. 15. Which formula does not represent a correct compound of magnesium? A. MgCl 2 B. Mg 2 S C. MgO D. Mg 3 N 2

11. 16. Which formula is incorrect? A. RbFr B. RbAt C. CaI 2 D. FrAt E. None of the above

12. 17. A covalent bond must involve A. Two protons B. Two electrons C. Two neutrons D. Four protons

13. 18. Which formula represents a true molecule? A. NaCl B. Na 2 C. F 2 D. KF

14. 19. To break or split a covalent bond, energy must be A. Absorbed B. Released C. Both absorbed and released D. Created

15. 20. The atoms in an I 2 molecule are held together by a(n) A. Ionic bond B. Coordinate covalent bond C. Covalent bond D. Halogen bond

16. 21. The bond between the atoms in HCl is a(n) A. Polar covalent bond B. Nonpolar covalent bond C. Ionic bond D. Double bond

17. 22. Which of the following is the most electronegative? A. Na B. Rb C. Cl D. Se

18. 23. Which of the following is the most electronegative? A. C B. F C. Ge D. Al

19. 24. Which of the following is the least electronegative? A. N B. P C. As D. Na

20. 25. Which pair of elements will form the most ionic bond? A. C and Cl B. N and O C. Na and F D. Al and Br