An element with the same number of valence electrons as the element with the electron configuration
1s²2s²2p⁶3s²3p⁵ is

Name: An element with the same number of valence electrons as the element with the electron configuration 1s 2 2s 2 2p 6 3s 2 3p 5 is A)iodine. B)oxygen. C)argon. D)potassium. E)sulfur.
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Question

An element with the same number of valence electrons as the element with the electron configuration 1s²2s²2p⁶3s²3p⁵ is A)iodine. B)oxygen. C)argon. D)potassium. E)sulfur.

Quizplus · Accepted Answer

The given electron configuration ends in 3p^5, indicating 7 valence electrons. Iodine, like chlorine, is in Group 17 and also has 7 valence electrons.

An Element with the Same Number of Valence Electrons as the Element