A. Ga, B. Al, C. K, D. Mn
2-5-2. What is the principal quantum number of the valence electrons of iodine?
A. 0, B. 4, C. 5, D. 43
2-5-3. Which of the following has no electron in its valence p subshell?
A. Ga, B. Al, C. B, D. Mn
2-5-4. For which of these are all the occupied d subshells completely filled?
A. Sc, B. Zr, C. Mn, D. Cd
2-5-5. Which of the following has a valence configuration of ns1?
A. Na, B. Be, C. Mg, D. Ca
2-5-ALD. When written in noble gas configuration, where [X] represents all electrons possessed by the noble gas in the row above the element in question and n corresponds to the principal quantum number or row number in the periodic table, which of the following corresponds to the ground state electron configuration of the valence electrons for elements in the same group as O in the periodic table?
A. [X]ns2 np4
B. [X]ns1 np5
C. [X]ns3 np3
D. [X]ns0 np6
2-5-JJW. What is the ground state electron configuration for zirconium?
A. [Kr]5s25p2, B.[Kr]5s25d2, C. [Kr]5s24d2
