Question

what is 2 nd ionisation energy​

Answer 1

Explanation:

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Second ionisation energy is defined by the equation: It is the energy needed to remove a second electron from each ion in 1 mole of gaseous 1+ ions to give gaseous 2+ ions. More ionisation energies. You can then have as many successive ionisation energies as there are electrons in the original atom.

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Answer 2

Explanation:

an elements second ionization energy is the energy required to remove the outermost or least bound electron from A 1+ ion of the element.