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Chapter 8: Problem 46

What noble gas has the same election configuration as each of the ions in the following compounds? a. cesium sulfide b. strontium fluoride c. calcium nitride d. aluminum bromide

Short Answer

Expert verified
The noble gases with the same electron configuration as the ions in the given compounds are as follows: a. Cesium sulfide: Krypton (Kr) b. Strontium fluoride: Strontium ion (Sr虏鈦�) - Krypton (Kr), Fluorine ion (F鈦�) - Helium (He) c. Calcium nitride: Calcium ion (Ca虏鈦�) - Argon (Ar), Nitrogen ion (N鲁鈦�) - Helium (He) d. Aluminum bromide: Aluminum ion (Al鲁鈦�) - Neon (Ne), Bromine ion (Br鈦�) - Krypton (Kr)

Step by step solution

01

a. Cesium sulfide

Cesium (Cs) is an alkali metal in group 1 and forms a 1+ ion (Cs+). Sulfur (S) is a non-metal in group 16 and forms a 2- ion (S虏鈦�). When combined, these two ions form the compound cesium sulfide (Cs鈧係). Cesium loses one electron when forming a Cs+ ion, and sulfur gains two electrons when forming an S虏鈦� ion. Thus, both ions will have the same electron configuration: Cs+: [Kr] S虏鈦�: [Kr] The noble gas with the same electron configuration as both these ions is krypton (Kr).
02

b. Strontium fluoride

Strontium (Sr) is an alkaline earth metal in group 2 and forms a 2+ ion (Sr虏鈦�). Fluorine (F) is a halogen in group 17 and forms a 1- ion (F 鈦�). The compound strontium fluoride (SrF鈧�) is formed by these two ions. Strontium loses two electrons when forming an Sr虏鈦� ion, and fluorine gains one electron when forming an F鈦� ion. The electron configuration of both ions is as follows: Sr虏鈦�: [Kr] F鈦�: [He] The noble gas with the same electron configuration as Sr虏鈦� is krypton (Kr) and as F鈦� is helium (He).
03

c. Calcium nitride

Calcium (Ca) is an alkaline earth metal in group 2 and forms a 2+ ion (Ca虏鈦�). Nitrogen (N) is a non-metal in group 15 and forms a 3- ion (N鲁鈦�). These ions make up the compound calcium nitride (Ca鈧僋鈧�). Calcium loses two electrons when forming an Ca虏鈦� ion, and nitrogen gains three electrons when forming an N鲁鈦� ion. The electron configurations are as follows: Ca虏鈦�: [Ar] N鲁鈦�: [He] The noble gas with the same electron configuration as Ca虏鈦� is argon (Ar), and as N鲁鈦� is helium (He).
04

d. Aluminum bromide

Aluminum (Al) is a metal in group 13 and forms a 3+ ion (Al鲁鈦�). Bromine (Br) is a halogen in group 17 and forms a 1- ion (Br鈦�). The compound aluminum bromide (AlBr鈧�) consists of these ions. Aluminum loses three electrons when forming an Al鲁鈦� ion, and Bromine gains one electron when forming a Br鈦� ion. We can write the electron configurations as: Al鲁鈦�: [Ne] Br鈦�: [Kr] The noble gas with the same electron configuration as the Al鲁鈦� ion is neon (Ne), and as the Br鈦� ion is krypton (Kr).

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