110k views
5 votes
Which ion with a +1 charge has the electron configuration 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶? Which ion with a –2 charge has this configuration?

a) Na⁺ and O²⁻
b) K⁺ and Cl²⁻
c) Ca²⁺ and S²⁻
d) Mg²⁺ and O²⁻

1 Answer

3 votes

Final answer:

The +1 charged ion with the electron configuration 1s²2s²2p⁶6s²3p⁶3d¹40s⁴4p⁶ is Cd+, and the -2 charged ion with this configuration is Se2-. The available answer choices do not include these ions.

Step-by-step explanation:

The question asks which ions have the electron configuration 1s²2s²2p⁶6s²3p⁶3d¹40s⁴4p⁶. A +1 charged ion with this configuration is the Cd+ ion, which is obtained when a neutral cadmium atom (with one additional electron in the 5s orbital) loses one electron. Since a cadmium atom has the electron configuration 1s²2s²2p⁶3s²3p⁶3d¹40s²4p¶5s², losing two electrons will leave the +1 ion with the configuration 1s²2s²2p⁶6s²3p⁶3d¹40s²4p¶.

For the ion with a -2 charge having this electron configuration, the answer is Se2-. A neutral selenium atom has the electron configuration 1s²2s²2p⁶3s²3p⁶3d¹40s²4p⁶4. Gaining two electrons fills the 4p orbital, resulting in the same electron configuration as given for the -2 charged ion.

So, the correct answer is not directly listed in the options provided. The options a) Na+ and O2-, b) K+ and Cl2-, c) Ca2+ and S2-, and d) Mg2+ and O2- do not include the ions with the electron configuration given in the question.

User AStupidNoob
by
8.3k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.