6.4 Electronic Structure of Atoms (Electron Configurations)

Filling orbitals in aufbau order to write ground-state configurations, the chromium and copper style exceptions, and the blocks they map onto.

Chemistry 2e, 6.4 Electronic Structure of Atoms (Electron Configurations)

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9 exercises

6.4 Exercise 2

Read the labels of several commercial products and identify monatomic ions of at least six main group elements contained in the products. Write the complete electron configurations of these cations and anions.

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6.4 Exercise 4

Using complete subshell notation (1s²2s²2p⁶, and so forth), predict the electron configuration of each of the following atoms:

(a) N

(b) Si

(d) Te

(e) Tb

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6.4 Exercise 6

What additional information do we need to answer the question “Which ion has the electron configuration 1s²2s²2p⁶3s²3p⁶”?

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6.4 Exercise 10

Which atom has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d²?

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6.4 Exercise 12

Which ion with a +1 charge has the electron configuration 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶? Which ion with a –2 charge has this configuration?

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6.4 Exercise 14

Which of the following has two unpaired electrons?

(a) Mg

(b) Si

(d) Both Mg and S

(e) Both Si and S.

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6.4 Exercise 16

Which atom would be expected to have a half-filled 4s subshell?

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6.4 Exercise 18

Thallium was used as a poison in the Agatha Christie mystery story “The Pale Horse.” Thallium has two possible cationic forms, +1 and +3. The +1 compounds are the more stable. Write the electron structure of the +1 cation of thallium.

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6.4 Exercise 20

Cobalt–60 and iodine–131 are radioactive isotopes commonly used in nuclear medicine. How many protons, neutrons, and electrons are in atoms of these isotopes? Write the complete electron configuration for each isotope.

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