Question:
How many of the following electron configurations for the species in their ground state are correct?
I. Ca: 1s22s22p63s23p64s2
II. Mg: 1s22s22p63s1
III. V: [Ar] 3s23d3
IV. As: [Ar] 4s23d104p3
V. P: 1s22s22p63p5
Select one:
a. 1
b. 2
c. 3
d. 5
e. 4
Answer
b. 2
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