38. Which of the following electron configurations represents an excited state?
a. He: 1s2
b. Ne: 1s22s22p6
c. Na: 1s22s22p63s23p24s1
d. P: 1s22s22p63s23p24s1
e. N: 1s22s22p3
39. Which of the following has the highest ionization energy for the removal of the second electron?
a. Na b. Ca c. Mg d. Be
40. Place the following species, O+2, O-1, O+1, O, O-2, in order of decreasing size.
a. O-2 > O-1 > O+2 > O+1 > O
b. O-2 > O-1 > O > O+1 > O+2
c. O+2 > O+1 > O > O-1 > O-2
d. O > O-2 > O-1 > O+1 > O+2
e. O > O+2 > O+1 > O-1 > O-2
41. Electron affinity is defined by which one of the following equations?
a. atom(g) + e- ā ion(g)
b. molecule(l) + e- ā molecular ion(l)
c. atom(s) + e- ā ion(s)
d. atom(l) + e- ā ion(l)
e. molecule(s) + e- ā molecular ion(s)
42. How many unpaired electrons are in a Vanadium atom?
a. 0 b. 1 c. 2 d. 3 e. 4
43. How many partially filled orbitals are in a Vanadium atom?
a. 0 b. 1 c. 2 d. 3 e. 4
44. How many unpaired electrons are in the V+2 ion?
a. 0 b. 1 c. 2 d. 3 e. 4
45. Identify the following orbital: n = 3, l=1, ml= +1.
a. 3d1 b. 3s c. 2px d. 3px e. 3pz