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Chapter 1: Q54E (page 9)

Question:Using complete subshell notation (1s22s22p6, and so forth), predict the electron configurations of the following

ions.

(a) N3鈥�

(b) Ca2+

(c) S鈥�

(d) Cs2+

(e) Cr2+

(f) Gd3+

Short Answer

Expert verified
  1. N3-= 1s22s22p6
  2. Ca2+= 1s22s22p63s23p6
  3. S2- = 1s22s22p63s23p6
  4. Cs2+= 1s22s22p63s23p63d104s24p64d10
  5. Cr2+= 1s22s22p63s23p63d4
  6. Gd3+= 1s22s22p63s23p63d104s24p64d105s25p64f7

Step by step solution

01

predicting the electron configuration of N3-

Observing the periodic table, we can write the electron configuration of N3-

The electron configuration for N3-is 1s22s22p6.

02

predicting the electron configuration of Ca2+

Observing the periodic table, we can write the electron configuration of Ca2+

The electron configuration for Ca2+is 1s22s22p63s23p6

03

predicting the electron configuration of S2-

Observing the periodic table, we can write the electron configuration of S2-

The electron configuration for S2- is 1s22s22p63s23p6

04

predicting the electron configuration of Cs2+

Observing the periodic table, we can write the electron configuration of Cs2+

The electron configuration for Cs2+is 1s22s22p63s23p63d104s24p64d10

05

predicting the electron configuration of Cr2+

Observing the periodic table, we can write the electron configuration of Cr2+

The electron configuration for Cr2+is 1s22s22p63s23p63d4

06

predicting the electron configuration of Gd3+

Observing the periodic table, we can write the electron configuration of Gd3+

The electron configuration for Gd3+is 1s22s22p63s23p63d104s24p64d105s25p64f7

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