Which one of the following obeys octet rule, PLEASE HELP ?

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which one of the following obeys octet rule, PLEASE HELP ?

Fe^-3
Sn^+3
Ni^+2
Ti^+4
Cr^+3

I know what octet rule mean but I really don’t understand the question ?
Which One and How ??

✅ Answers

? Best Answer

  • The octet rule means that the species has 8 electrons in the outer energy level.

    Ti + 4 and Ni +2 Ti as an atom is 3d2 4s2 and loses these 4 electrons to leave an Argon electron arrangement with 8 electrons in the outer energy level

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