a asked in Science & MathematicsChemistry · 1 month ago

Which one of the following pairs are isoelectronic?  a. Mn2+ and Ar b. zn 2+ and Cu2+ c. Na+ and K+ d. Cl- and S e. K+ and Cl?

1 Answer

Relevance
  • Argent
    Lv 7
    1 month ago

    a. Mn²⁺ is the same as [Ar] 3d⁵, which is definitely not isoelectronic with argon.

    b. Zn²⁺ is the same as Cu⁺, not Cu²⁺, so no match here.

    c. Na⁺ has lost its one valence electron, so is isoelectronic with a noble gas (neon).

    K⁺ has also lost its one valence electron, so is isoelectronic with a noble gas (argon).

    d. Cl⁻ has the electron configuration of argon, which is not the configuration of neutral sulfur.

    e. K⁺ is isoelectronic with neutral argon, not neutral chlorine.

    • a1 month agoReport

      so neither of them is isoelectronic?

    • Login to reply the answers
Still have questions? Get your answers by asking now.