1. Write the ground-state electronic configuration for each of the following ato

Question

1. Write the ground-state electronic configuration for each of the following atoms or ions. Determine the number of unpaired electorns. Use noble gas inner core and condensed spdf notation

a. Mg   b. Cd   c. Se2-d. Mo   e. Ge 2+(write expanded spdf configuration without noble gas core)

2.) Which element has the following configuration in the outermost subshells

A) 5s1 B) 3d104s24p2 C) 4f145d106s26p1

3. For each:

i) Predict the stabe ions,

ii) label the the type of ion (noble gas type, pseudo-noble gas type, "18 + 2", transition

iii) write the electron configuration for the ions

A.) As (2 ions) B.) Sr (1 ion) C.) Ti (2 ions)

Explanation / Answer

1)
a) Mg = 1s2 2s2 2p6 3s2

b) Cd = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2

c) Mo = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d4 5s1

d) Ge+2 = 1s2 2s2 2p6 3s2 3p6 3d10 4s2   

2)
A) Rb
B) Ge
C) Tl

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