What element forms an ion with an electronic configuration of 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 (or [Kr]) and a -2

Question

What element forms an ion with an electronic configuration of 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 (or [Kr]) and a -2 charge? Give the symbol for the element.
element symbol:

Kunduz · Accepted Answer

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