UNIT 3’02 – SELF-TEST
Part 1: Multiple Choice with explanation.
1. The configuration for the outermost energy level in Ca is: (a) 3s2. (b) 4s2. (c) 2s1 (d) 4s1.
2. Among the following groups of atoms, which have the same outer energy level configurations. (a) H, He. (b) Li, Be, N, Ne. (c) Mg, Al, Ca, Ga. (d) N, P, As, Bi.
3. Among the following, which element has the lowest ionization energy? (a) Na (b) Cl (c) Cs (d) I
4. What is the number of electrons in the outermost occupied energy level of an element in Group 5A? (a) 5 (b) 3 (c) 8 (d) 18
5. Which of the following are always larger than the neutral atoms from which they are formed? (a) positive ions (b) negative ions (c) cations (d) none of these
6. The element that contains an electron in a d sublevel is: (a) Mg. (b) O. (c) Fe. (d) Ne.
7. The smallest particle from among the following is: (a) Li-- (b) Li (c) F (d) F--
8. As you move down a group of the periodic table, atomic size generally: (a) increases. (b) decreases. (c) remains the same. (d) varies randomly.
9. As the atomic number increases and the additional electrons are added to the same principal energy level, atomic size generally: (a) increases. (b) decreases. (c) remains the same. (d) varies randomly.
10. Among the elements listed, which would show the largest increase between the second and third ionization energies? (a) B (b) P (c) Ca (d) Zn
Part 2: Short Answers and Problems: Answer the following questions in the space provided.
11. Indicate which element in the following pairs has the greater ionization energy:
a) gallium, fluorine:
b) magnesium, calcium:
c) sulfur, oxygen:
d) sodium, silicon:
12. Indicate which element of the following pairs has the greater electronegativity.
a) calcium, gallium:
b) lithium, oxygen:
c) chlorine, argon:
13. Explain the trend in ionization energy in terms of the fundamental forces in an atom and relate this trend to the periodic trend in atomic radius.
14. Give two different group numbers for the following families:
a) nitrogen family (b) copper family (c) noble gases
15. State whether the following elements are metal, non-metal or semimetal.
(a) zinc (b) iodine (c) arsenic (d) potassium
16. Identify on a periodic table the various blocks on the periodic table and give the names of these blocks.
17. Name the four special families on the periodic table.
