Of the most common ions of the third period elements mg al p and s which is the largest

Question

Chemistry

Lacey Raymond

9 July, 09:02

Of the most common ions of the third period elements mg al p and s which is the largest

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Answers (1)

Know the Answer?

Marley Monroe · Answer 1

Answer is: P (phosphorus).

Magnesium form cation Mg²⁺, Mg lost 2 electrons, ionic radius decreases.

Aluminium form cation Al³⁺, lost 3 electron, radius decreases.

Phosphorous can form the phosphide anion P³⁻, gain 3 electrons, ionic radius increases.

Sulfur can form anion S²⁻, gain 2 electrons, but have one proton more than phosphorus, so smaller radius.