Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Trending News

Promoted
NJBR
NJBR asked in Science & MathematicsChemistry · 6 years ago

Which of the following ions have noble gas electron configurations? (Select all that apply.) A. Mn2+ B. Ca2+ C. Zn2+?

1 Answer

Relevance
  • Happy To Help
    Lv 5
    6 years ago

    electronic configuration of Mn = [Ar] 3d5 4s2

    electronic configuration of Mn2+ = [Ar] 3d5

    electronic configuration of Ca = [Ar] 4s2

    electronic configuration of Ca2+ = [Ar]

    electronic configuration of Zn = [Ar] 3d10 4s2

    electronic configuration of Zn2+ = [Ar] 3d10

    so answer is B

Still have questions? Get your answers by asking now.