Respuesta :

#1

K^2+

How?

  • K has Atomic number 19

Let's look at electronic configuration

[tex]\\ \sf\longmapsto 1s^2s^22p^63s^23p^64s^1[/tex]

  • 2+ charge means 2 electrons donated.

New EC will be

[tex]\\ \sf\longmapsto 1s^22s^22p^63s^23p^5=[Ar]^-[/tex]

Hence its not stable .

#2

Anion means minus charge

Hence our answer is O^2-

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